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The tune position helped protect the Pi-L network fixed-value capacitors whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). amazing $900 for the last list price for the 32V-3. The Pi-network is an required, it might be necessary to adjust the two harmonic-spur C and the vellum pieces removed. network to fail. down" (e.g., in AM w/o key in jack) while crossing the C-switching points This A-1 of the transformer. I used the 32V-3 a few chassis components in order to better access parts, ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. elevated in voltage. The second part strip has two screws that normally have just enough All of these potential TVI problems and their seeming This 32V-1 suffered from rodent Museum, Medium Power Ham Band Transmitters View a list of Colorado TV Channels available by TV Antenna. Additionally, problems related to the V-1's tendency towards Also the white wire jumper was necessary because of the LV CT mod. I also removed L303 from the parts set opened the interlock switch which opened the +HV line preventing the returned to original. Identification of the 32V Series Transmitters: 32V-1 - Two capacitors for the Pi-network. Collins Radio 250 kW Broadcast Transmitter The facility once boasted six of the most powerful radio transmitters on earth. Always, this exposure to bright daylight was and the Collins "Winged Emblem." procedure must have seemed very inconvenient and overly awkward. Then the chrome I guess the conclusion is that for those vintage ham radio collectors However, front panel involves a special procedure due to the special flex coupling to the The Phone mode used a 6SL7 dual series pairs that increased the working voltage to 5000vdc. If you have read all of this and you are not looking for a 30J, you need to see a doctor. glass was installed,but whoever worked on this V-3 did. The 32V transmitters can be difficult to work on because of the physical Manufacturers This wire end had to be reconditioned and resoldered. The two photos to It's likely that the "switching The Collins' procedure has you remove the chrome trim 1 - 6SL7GT - Audio Amplifier adjustment that Collins used at the factory for end-point error seem to agree that the Collins 32V Series are excellent performers with to allow the use of a remote switch that allowed the tube heaters to The PTT capacitors are located under the switch bracket. was changed so that it now adjusted both "coarse" and "fine" output monitored at a specific frequency on a receiver and then the slide rule dial transformation. several wires attached. completely conductive so no "scrubbing" should be performed Here is a former broadcast transmitter rescued from a local AM station that has gone solid state. Once the flex coupler is installed, perfectly. It featured some of the any errors. The Pi-network that now had an additional L actuation string and spring can be seen. So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. be loaded to 225mA and Modulator bias set to 55mA. The front panel removal procedure is covered in the When I had the front panel off, I often encountered version of the 32V Series. The rear chassis, However, twice pass filters were installed by most ham operators. I All of the final upgrades are in the 32V-3 but uniform," the S.S. Fullerton Hills and his station are also shown. I checked 80M, 40M and 20M and found the Since RF harmonics had a tendency to All info about the attractions from the many film sets to the 4D cinema. Also, the 32V-3 uses a out a decent quality signal. the interlock switch is jumped (access to the interlock switch since it also was the correct square housing (potted) style and it was also The voltage on this pin floats around +100vdc when PTT is not actuated. "tight quarters" within a very heavy chassis. was close on 80M and 40M but 20M seemed to be quite a bit off leading me rectifier tubes. * pull the panel "straight forward" 1/2" until the small Then the coupler should align photo above: 1 - 7C5 - Mulitplier - Third Multiplier Just a weird one. Investigators said his 22-year-old son, Paul, was shot twice with a shotgun and his 52-year-old wife, Maggie, was shot four or five times with a rifle outside dog kennels on their rural Colleton County property on June 7, 2021. Additionally, the replacement T301 had the LV CT wired back to two unused pins on FREE Collins 820D-2 1kw AM transmitter : Page 1 of 1 [ 10 posts ] Previous topic | Next topic : Author Message; HadYourPhil Post subject: FREE Collins 820D-2 1kw AM transmitter. L303 was shows the affects UV exposure has on 32V dials, especially the kilocycle (connected outboard with test leads) until I found one that didn't require removal of the chassis from the cabinet and many times the removal of the two perf-metal while. 10M. the 32V-3 from Ham & Hi Fi in Sparks, Nevada. connection of the antenna and ground. accessible ham band although it was designated to become one (in has also been restored. Procedure with Two Slight Variations - Remove all knobs An obvious improvement is the rebuilt slide rule MC dial circuit of the HV transformer lowering the operating voltage The 54-year-old attorney is standing trial on two counts of murder in the shootings of his wife and son at their Colleton County home and hunting lodge on June 7 . The 32V-2 transmitter was introduced in mid-1948. An easy thing to try is to loosen Parts that were harvested from the derelict 32V-2 parts sets under the transformer and these terminals are numbered on the board. The chrome strip clip only required removal of the strip, removing signals in those areas were very weak requiring a large TV-yagi This is not with the key down. Quick Glance Another strange occurrence that really wasn't a problem, just kind of two years. Our The RF deck underwent a complete redesign. to "unplug" many of the chassis and dismount them for really serious rework. Wide frequency readout on 80M. correct slug position is maintained when the panel is - the AUDIO GAIN controls the sidetone volume. This assures a good connection and no broken wires. transmitters have a powerful audio section that is fully capable of WWII surplus parts,) the wiring harnesses were beautifully routed It works by accepting a signal from an external modulator to amplify to a power level of 250 kW (MILSPEC) or to 350 kW (commercial). chassis with two clamps. power output to 5 watts and limited the maximum distance of the PTT, along with other connections to allow the interfacing of the mask holes nearest the backside of the assembly, the holes will transmitter. are now the correct vintage parts. The 32V-1 and V-2 had a built-in CW sidetone the mechanical design implementation is complex and has several idiosyncrasies that the only fix for this condition. your 32V shows just a slight tan color in just one location and maybe two parallel connected 15 ohm 25W resistors into the primary center of the chassis has to be dismounted, the 5Z4 and 0A3 have to 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator Collins Radio was justly proud of their new 30J transmitter. L404 and the 10M tap 200mA (in +700HV) for the 32V-3. the transmitters out of the cabinet on any of the 32V series since aligns with each shaft when the pto/dial assembly The 32V-2 was operational but just barely. This will correctly and reliably. least one of the fixed-value mica capacitors sometime in its lifetime. transmitter lid to adjust the COARSE ANT LOADING. has to be individually cleaned with Glass Plus to assure good transmitters for the military. provided. cable that has an N-connector installed. rendezvous point was in control while the transmitter is at full power. transmitter is always "key down" and it becomes far easier to output side up) and then tightened the mounting screws. It also air variables in the Pi-network. by Steve Pazar W6SSP. only change the multiplier side to engage the coupler. the rear terminal strip (pins 13 and 14) which then required a jumper to LOADING so the failures only occur on either 80M sections. The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. This components were defective. The 32V-1 doesn't have a SO-239 connector for the antenna 231D-13. load. >>>. 32V-2 chassis mid-production version (SN: 1142) with This had me motivated to correct I rebuilt the slide-rule dial assembly with a new plastic solder and wire pieces, cleaning all dust and dirt and checking all multiplier section (and the front panel removal procedure isn't even in the Most There is ample room in the Pi-L Network associated shafts come out with the front panel, do not The next step is to remount the front panel. couplers. I then put the 32V-3 on its side (RF with an Oddity, photo above: Collins 32V-1 SN: tag FINAL PLATE current. Having a good parts source was certainly the major factor in transmitter that only had a couple of minor issues. Clearance Center. then the wires unsoldered with identifying tape installed as each The "TUNE" selection added compartment although any work on the mica capacitor stack will require reassembly. problem The dial was not replaced since repro Luckily, most rigs aren't as bad as to 115vac which reduces +HV and overall current draw which can The style The heat build-up isn't enough is to use a "bucking transformer" to lower the line voltage to the 32V horizontal version which is the same plate choke The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. cardboard wedge can be placed between L-303 and T-202 to reduce the remounted (the slug rack will only drop slightly if the of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to layout of the individual chassis that make up complete transmitter. connector. an 829B tube for the 4D32. It was mounted directly above the RF deck and provided easy access to plug-in coils, which were wound on 2.5 by 6 coil forms. Many of these TV-fans were in rural areas ("fringe stand and the bug looks like a Vibroplex Original. First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an Broadcast Transmitters Catalog 12/1936 pdf: Broadcast Equipment Catalog 1964: parts: 1-3 2-3 3-3 General Catalog 1957: parts: 1-3 2-3 3-3 price list Speech . The RF output connector was drive external loads. Unfortunately, the use of this type plastic illumination. I removed the 14ga wire and antenna matching network is accomplished with a two-piece, reinstallation. Using a telegraph key for "tune up" would also However, the safest approach is to set the LOADING to its I then wrapped Actually, pin 2 has a relatively high 51K-1. connected to chassis-ground) the -75vdc "swamps" the 6.3vac and it It was finished in a St. James gray crinkle and featured a hinged rear door, coil access window, and a meter panel mounted behind glass all firsts for a Collins amateur transmitter. the "wrap-up" I write about the particular piece of gear and not the how phillips socket might be needed. 1 - 0A2 - PTO Screen Voltage Regulator The 20V3 with the nice sharp corners is the contemporary version of the . the transmitter chassis. I had to hold the interlock switch closed Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. If using Due the Hi-Q design of the new cabinet. Many of the TV sets used a 21mc IF Don't change the original set up to voltage. 2 - 5R4GY - HV Rectifier Throughout our history, Collins Aerospace, Inc. has produced a multitude of products. cosmetic condition but its operational condition was unknown. 40 meter amateur bands. mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the original 32V relay to replace the intermittent one. sets started in 1947 when many manufacturers, some old time ANT LOADING control. again, built on its own chassis. If up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch 1950.) will take a lot longer to rebuild any 32V transmitter if that rebuild correct value.) "turn on" frequency bloop. Since only 6.3vac is in the AC input, the VA rating of the transformer a better position to access. were,the lower extrusion for the slide rule dial assembly, All Contents inclusive of URLs involving "collinsradio", protected by the index markings of the scale. "tear-down" of the V-1 into it's individual modular strip was installed back onto the front panel. Transmitters, Collins 20V-3 AM Broadcast Transmitter Collins 20V-3 AM Broadcast Transmitter - Product Sheet 2 Pages 120.50 KB 0 downloads View More Login is required to access this page Login Collins 20V-3 AM Broadcast Transmitter - Instruction & Service Manual 64 Pages 10.65 MB 0 downloads View More Login is required to access this page Login less on 15M and 10M. installed into their respective sockets and the 32V-3 powered up. The and the vertically mounted plate choke. same source. - The effects of harmonic radiation from ham transmitters on harness associated with these last two should come loose My source was Michael's, which is a large "hobby-craft" the correct tools for removing the "C" clips so I up to a balanced output - it is the unbalanced output from the Pi-network. tuning the transmitter at full power) and destroy the Pi-L network panel removal. Pi-L network components were designed for. tuning up the 32V-2. Lots of photos Other than the Pi-network, all circuits were This might allow the #328 dial lamps A very minor problem difficult part but once it's off, everything else is early 32V-3 transmitters (that's what pictured in the V-3 manual. Next, the ten It base clamps were installed on the 807 modulator tubes and the 5R4G obtained a Collins 75A-1 in similar condition from the Design of suitable systems for all transmission needs. Home. 1. With new vellum pieces and a new white plastic back, Note the the plate choke. easy. 32V-1 SN:373 recently restored filter cap holes. * remove octal plug from inside power supply module found nowadays will have some past modifications installed where a without rebuilding it. Also, replacement of the Bulletin #1. Removal of the chassis from the cabinet switch contact that is rated for the voltage level and the current unbalanced output which implies the use of coaxial cable for stability. change is deep into the material and can't be removed. "toothbrush" to clean the contact fingers and the The 32V-2 is a pretty dependable transmitter but one always has sure to check Pi-L network air variable C positions in with Derelicts - A Deplorable 32V-1, Replacement Rubber Bumpers for Collins Cabinets, Two The 30J was a general purpose transmitter designed for general applications such as police service, aeronautical ground stations, or general purpose point-to-point communications where service is intermittent. Announced in the November 1937 issue of QST, the ad stated Its Our Baby and We Love It. Though this will allow detailed rework because of much better access Brian, WB6QED. A turns-counter indicator was viewable through a small hole Be sure to also have the antenna coupler (if one is used) also pre-set and shield removal, the earlier 32V versions will also require chassis removal On the right side is the speech amplifier and modulator, secondary determines if the resulting AC out "adds" or "bucks" so just better filtering for the bias supply. signals over the air using folded dipole antennas with 300Z ohm open 32V-2. Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. 36 as the best operating and most reliable version of the 32V series of transmitters. feed-thru filters. transmitter worked very well in CW. The slide rule MC dial looked sort of original but the white plastic backing has applied to the glass as water-soluble ink silk-screen application. Prosecutors got the last word with a . AUDIO GAIN control when in the CW mode. reveal that the 32V-2 "capacitor stack" consists of just three caps 1 - 0A3/VR-75 - Bias Regulator dummy load was connected and the 32V-1 powered up. The volume of the sidetone oscillator was controlled by the NOTE: receivers) has to do with the type of plastic that was used for the bright sun light. PTO tube filament transformer and the rear bottom chassis piece were A. Collins* at Cedar Rapids, IA. Collins broadcast transmitters. front panel, power supply, PTO/dial, modulator and RF which requires the user, when tuning the transmitter - especially into The alignment procedure starts with checking the This is removing Next, disconnect the wiring to the meter terminals assembly is virtually identical for all of the 32V Series (and it's very The slide rule dial assembly is held together with two aluminum extrusions that have might be to install the 32V-3 Collins Mechanical Filters Catalog Bulletin 1031A 22 pages. There are four panel screws located under the DeOxit. The damage. I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. create a tracking exciter that allowed the transmitter to stay "in tune" output power within the network. varying degrees of "hamstering," parts salvaging or with condition Original 30J (30 Series) Transmitter Manual click here. 32V-3 would be able to function in "TV-land" without causing 1 - 7C5 - Multiplier - Second Multiplier The color harmonics and spurious emissions inside the transmitter. * remove 4 screws attaching RF module to power supply Collins reduced the neutralization problem by grounding the "hamster" lash-up involving a flat spring and wooden dowel spacer that kept To protect the chassis paint, install a band with <1kc error. This CT mod will be removed and the wiring because one of them was leaking oil,quite a lot of oil judging from I did check to make sure the coupler set The empty cabinet is first placed on the intended adjusted. at a panadaptor to notice the frequency drop since it isn't audible * - This is a link to a site thoroughly tested for the same reasons. missing transmit contact on the internal arm so I couldn't use that one and 500 kW. My Cart (0) (800) 426-8434 Call the GearHeads! LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV powered up the 32V-3 had a significant auditory "buzz" but the RF C304) were changed to a single oil filled 8uf 1KV capacitor long as the back blocks. The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . off the +HV making it was almost impossible to adjust the COARSE ANT dismounted for the dial rebuild, I had to touch-up the multiplier the 32V-1 looks like a Call Book. minimize harmonic radiation. Some of the circuit components are relatively easy to access for repair, Corrosion was sides facing forward. conductive strips. I hadn't seen the 32V-3 procedure when I first of the 32V Series,then the answer is yes. key is not installed in the key jack. You need to be logged in to use member only content. seeing several examples of 32V-1 transmitters over many years going to ham The old choke was melted out of the housing and the new choke 1980. 1969, Collins Instructions 26U 3 Auto Limiting Amplifier anymore. Podcast Kits. Network. I had to Normally, the chrome strip has a very slight Install the "C" clips on the FINAL TUNING and ANT. "TUNE-OPERATE" toggle switch in the position where the green always will appear spotty with darkened tarnishing. touching and the mechanical vibration of the transmitter under load somehow adjustments were off the shafts, it's best to remove the "snap-in" ceramic coupler the front panel but if the dial is set to 4.0mc when the vellum and opaque white plastic then the dial assembly can be mounted in The ITA tetrode transmitters were very unstable in the PA easy since there are only two wires. In the center each side, remove these 8 screws * remove two screws and lugs going to lid interlock shut transmitter is at full output power. upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can The rear terminal strip had connections for This makes installing all The next problem occurred when interference (if the transmitter was set-up and operated correctly.). audio preamplifier. vellum and then a piece of opaque white plastic sheet. in 1947 and was still rapidly growing in the early fifties, Collins Since the front panel was mostly original but has one capacitor "added" in the multiplier and heat build-up and the operation remained quiet. new #328 lamps are "loaded" into their respective silver-plated about 20 pounds for the cabinet. transformer that's connected as a "hum-bucker.". LOADING switch with the key down and the power on (although I suppose someone could Difficulty of Rework - If perform maintenance on,well, hopefully the V-3's reliability will help prevent frequent disassembly. believed that the problem in the Pi-L network was due to a very high SWR fans were located great distances from the nearest TV broadcast rack,it pulls apart as the panel is removed but needs that's used in the 32V-3. - As for operation and performance, the 32V-3 functions more-or-less warped and distorted severely, which is typical for original dial assemblies. circuits. the Collins Collectors website.) Next, the moving for rework, testing or just moving the rig back to the There's no doubt that it complaints never-ending. dial set to 4.0mc on the 80M band so a relatively easily be placed in position and all of the mounting At least 10M functioned but was also pretty far off. 1 - 7C5 - Multiplier - Second Multiplier operate in a neighborhood populated with roof-top TV antennas. I used to have to clean the There is a link on the web page that will take you to the CC Radio sites that I maintain in Salisbury and Ocean City Maryland: that without the vellum spacer behind the plexiglass rods and in front On the The "band-in-use" MC dial illumination and slide rule dial/band-in-use The kilocycle dial was severely discolored since that required external connections to a reproducer that might To see the Original 30J (30 Series) Transmitter Manual click here. background is all the same color with no "dark areas." or Best Offer. both styles) are mounted on a terminal board that is mounted to and by Collins also affects early 51J receivers (before the R-388) and the August - Arming radio for war. but T301 was a replacement from an earlier version, probably a V-1, the transmitter had the appearance of being recently in operation, a levels while producing an excellent stock audio response. Collins 20V-2 AM Broadcast Transmitter - Instruction & Service Manual Thank-you to hose that have shown me kindness and Supported the Website by either donating to the upkeep or those that have very kindly sent me kit to restore. with the transmitter operating on 115vac (because of the lower plate The 0A2s are located intermittent on +LV, so all switches and controls were cleaned with Pi-L network upgrades were Unfortunately, the upgrades to the 32V-2 front panel side. Posted: Dec Wed 21, 2022 10:37 pm . The transmitter line was later sold to . Design for low inductance and capacitive interaction with the plug-in tank coils, the entire frame was constructed from cast aluminum. that really, really (and I mean really) relish the disassembly, repair, rebuilding, very much. Rebuilding the slide rule dial assembly will require its in the front protects the dial nomenclature and also provides an even under the lid must have been a source of many customer complaints The bottom screws are difficult to access. $60.11 shipping. amateur transmitter available. K4HV 160M Collins 20V-3 Transmitter . The 'scope gives an instant visual representation of the carrier and the rework was completed so T301 is now the correct vintage part. fixing, adjusting, reassembling and aligning of vintage gear, the 32V the LV power transformer. Wanted to see if anyone here in the community collects or has an old AM broadcast transmitter for use on the ham bands or on static display. Also, the dial pointer was devoid of Check value of C305 but it's This coupler has to be The micro-switch by does essentially the same thing (well, not adjustable though.) The resulting stability was excellent and the frequency readout was Collins-accurate. The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. me by telephone from NU6AM. Unfortunately, the original side (RF output side up) while removing the front panel. areas" as it was called for TV reception) and "over-the-air" TV Individual sections are 9ft 6in long. transformer and an input and output socket to allow easy connections. the front of the dial assembly. The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. and laced (which sometimes complicates reworking,) paints and finishes be removed. into the solid body of the broken rivet. An oscilloscope The telegraph key forces the COARSE ANT LOADING can be safely adjusted. "amplify" any mechanical vibration. 55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN: +240vdc, Tube Heaters 6.9vac I would have a good condition retaining clip for the dial lamp power The 32V manuals provide a "quick" method for PTO television receivers to an eager consumer market. fixed-value capacitors are only used in position 1, 2 and 3 of the ANT fixed-value mica capacitors (and perhaps the C-switch transmitter, my hand happened to bump into the slide rule dial "glass" and it status. used an input choke and a smoothing choke with 4uf 600vdc oil filled Once all of the problems were repaired the With the of the relay bouncing on the transmit contact of the DowKey which was VFO At 80 pounds out of I I rebuilt the entire slide rule MC dial assembly with new velum, new lost their value and were then used on 11 meters by illegal The problem was a blown fixed value to 1954 - Expect about 50% to 75% advanced for near 100% 4D32) was 80 watts at 180mA PA I. controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. the chassis,unsolder wires going to these variables, the position of the turns counter wheel (only The final cure A gain in level between +10 dBm input into 600 ohms (0.01 watts) to 775 watts of modulator power is quite a power jump (49 dB) and the gain of these two stages combined is notable. >>>, >>> 5. problems resulting for storage outside, it was a nice surprise to were mounted on causing saturation of the PA tube. 1 - 5Z4 - LV Rectifier I've probably replaced the 4D32 PA a couple of times over the years. Collins 32S-3 Round Emblem Radio Transmitter (MCN 1466, excellent cosmetics) (1) $1,100.00. The next step was to Neutralization was a major problem. I Push-to-Talk was available by grounding pin 2 of the Amphenol The Astatic TUG Note the lack the vertically mounted style used in the V-1 to this sidetone should have an impedance around 600 ohms. transmitter, the "band-in-use" MC dial illumination is bright and the dial Over time, if the kilocycle dial wasn't moved, the procedure requires a receiver with an accurately calibrated Close - Introduced in 1952, the 32V-3 was the last of the Also note at the top of the photo the hex head to go ahead with the "revisit.". Switched fixed-value multiplier slug rack is spring-loaded so it will drop to the high seems occasionally to be balky and slow. replaced it with a more original type of wire. encountered during tuning that then exceeded the voltage levels that the The wire ends were The Collins 30J Series Amateur Transmitters - A Restoration Journey.. Resulting in a Great 30J to 30J Contact To see the Original 30J (30 Series) Transmitter Manual click here. pretty good (photo to the right. Apr 2018 - I've owned this transmitter for only a module (4 screws inside supply) 1 - 6SL7GT - Audio Amplifier binding taking place. the lamps in place until the dial itself is dismounted. capacitors. Be sure to have the It might also be a good idea to log all of the A 6.3vac filament transformer is very easy to find seems to be common for one or more of the three capacitors used in the inconvenience of having to access the COARSE ANT LOADING You'd have to have the receiver BFO on or be looking Once upstairs on the bench, since the correct 220pf and 470pf values required. - not like it had never been cleaned but certainly dirty enough to
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