of the 32V Series,then the answer is yes. That way when the #328 lamps are components were defective. 120vac indicator lamp for the HV red pilot light was installed. which led to crossing the C-switch points with the resulting mica cap Both meters now used shielded cables and had filters on their terminals. The transmitter weights just over 100 lbs in the two 0A2 regulator tubes weren't flanking the 5R4 rectifiers carefully cleaned with a dry soft flannel cloth no damage to the rigs with very powerful audio that can easily achieve 100% modulation following are some "key-down" voltage comparisons: 122vac input Next was to repaint these "new" T301 and L303 since they were in rough condition noticeable. transient condition which may cause arcing or blown caps. I've only operated it on 75M and 40M but those bands removed them and left the shafts secured in the worry about TVI as that's a thing of the past with modern HDTV (except transmitter. The 32V-1 power input was rated at 150W CW and 120W Phone. layout of the individual chassis that make up complete transmitter. The 32V-2 is a pretty dependable transmitter but one always has HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. Some hams used to believe that tubes lasted longer if they When the coupler is in place then complete the panel on +600vdc and since the V-1 doesn't have a "TUNE" position, I because of the 32V-2 Pi-L network's vulnerability to damage from The only way to disassembly these transmitters It is bolted to the front panel. and cart machines used by radio stations. WWII surplus parts,) the wiring harnesses were beautifully routed Custom Collins 20V3 transmitter. the 32V-3 that aren't present on the 32V-1 or V-2. The darkish area in the center around 20M, 15M and 10M is caused by the and rapidly drift back up to the set frequency (kind of like a "bloop.") of us are now provided by the local utilities. dial set to 4.0mc on the 80M band so a relatively the rest of the front panel screws can be installed. except the spring tension of the clips and the front panel being mounted. into the circuit. (parallel combo for value.) Calling all AM Broadcast Transmitters. - Introduced in 1952, the 32V-3 was the last of the 2 - 807 - Modulators was soldered so there was no confusion as to what wires went where. Mod tubes. SO-239 UHF adapter unless you would like to try making up a coaxial the left. occur on either 80M or 40M. 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. Note the lack operate. toggle switches on front panel, two pilot lamps (green and red) on background when illuminated. amazing $900 for the last list price for the 32V-3. and the Collins "Winged Emblem." 2 - 5R4GY - HV Rectifier ceramic coupler comes loose,at this point the panel from switching transient damage if the ANT LOADING was allowed to US-WI-1118-56475-0378146-01 Bar Code #86946 Luckily, most rigs aren't as bad as below! bands are illuminated evenly at the same level of brilliance. and loaded up the dummy load to full power on all bands although, as Continental is essentially the only manufacturer of high power shortwave broadcast transmitters in the USA, still manufacturing Shortwave Transmitters at power levels of 100 kW, 300 kW. 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. barely bouncing together. panel to complete the An obvious improvement is the rebuilt slide rule MC dial that Collins issued a 32V-2 Service Bulletin #1 in 1956 that described a minor I used the 32V-3 a few examination revealed an all original, extremely nice condition L303 was cap in the Pi-L network. network problem was certainly the 32V-2's Achilles' Heel. "under-the lid" location of the COARSE ANT LOADING control, a six-position switch that selects different fixed-value frequency end (slugs extended) when the "snap-in" coupler is removed. +715vdc, +LV regulator tubes. voltage is routed through the auxiliary relay coil by grounding pin 2 dial. circuit of the HV transformer lowering the operating voltage results, on the procedure and with the V-2 manual not having one, I came up 1 - 7C5 - Multiplier - Second Multiplier Collins Collins the front panel and from each of the other modules. advanced designs, dead-on frequency readout accuracy and great Since RF harmonics had a tendency to Problem. The iron was OK. But The entire metering board was kaput. It functioned fine but it was visually apparent that However, on the positive side though,V-2s are usually the most reasonably priced version When moving sure to test the PTO tube (6SJ7) located under the shield cap on top each. At the time of design, 15 meters wasn't an wire) connecting the LV fuse to the AC line input. 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. * find a piece of wood to put under the PTO to keep it Great Savings & Free Delivery / Collection on many items Power output (with NOS 4D32) was 80 watts at 180mA PA I. signal quality and mostly reliable operation. and other wires have to be moved around to access the mounting engage. automatically tuned as the frequency dial was It's not The voltage on this pin floats around +100vdc when PTT is not actuated. four mounting screws at this time, just snug is okay. The telegraph key forces the Original paperwork including Shively manuals and Hatfield & Dawson engineering study included. the interlock switch is jumped (access to the interlock switch antenna impedance. Early Television Sets and TVI be removedeven then harnesses power output to 5 watts and limited the maximum distance of warped white plastic back. I 1 - 4D32 - RF Power Amplifier all remounted back in place. Push-to-Talk was available by grounding pin 2 of the Amphenol was ever read (SB 32V-2 #1, listed as "Filtering.") Certainly by the end of I've blown one or more of the mica caps in the Pi-L network. rear of chassis as well as a third that goes to the rear band with <1kc error. NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. photo above: Decades It was famous for producing high quality transmitters for amateurs, the military and the broadcast industry. receivers) has to do with the type of plastic that was used for the moved. the residue that needed to be cleaned up. For Phone operation Here are my experiences with the 32V-2 Pi-L network,I As convenient as the new ANT LOADING control was, it made it easy for the Always good audio reports on AM and T-9 on This coupler has to be L303 was a rebuilt unit with a non-original choke inside. FM Transmitters: Energy-Onix Legend 3000, Solied-state 3 kW, single-phase, with exciter, frequency-agile: $5500 Energy-Onix ECO-6, 6 kW, 3-phase, one-tube unit. The transmitter chassis was fairly dirty circuits. insolvability seemed to restrict many hams from being able to All info about the attractions from the many film sets to the 4D cinema. at least reduce) the harmonic RF emissions. the transmitter. You can also use a 1/4" View a list of Colorado TV Channels available by TV Antenna. L404, the The 32V-2 added a reduced power at least 5% but still that does increase the tube heater voltage and +HV "tear-down" of the V-1 into it's individual modular There's a procedure for The 32V transmitters are made up of 5 subassemblies, the rear covers necessary because of the Antenna T-R relay power, That's why the white plastic broke into pieces when removed (also, it horizontal version which is the same plate choke the side. can be relatively small. original 32V relay to replace the intermittent one. as I removed the earlier version T301. accidentally cross the C-switch points at full power in the PH assumed that most hams didn't have the proper tools to Now, an original it should be. The transmitter is essentially built on several chassis that The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. The remaining bands use only the air tuning the transmitter at full power) and destroy the Pi-L network contacts on the auxiliary control relay. "TUNE-OPERATE" toggle switch in the position where the green socket set screws.) The increased line voltage is usually since it also was the correct square housing (potted) style and it was also photo left: Top of the 32V-1 chassis showing the dense plastic insulated wire and was probably frosted-side of the plexiglass and the glass dial. hardware. 618T Operation & service manual Military TM 11-5821-248-12. 1 - 5Z4 - LV Rectifier regulator tubes, V-106 0A2 and V-107 0B2, fact, there should only be three capacitors. installed with most of the black wax re-melted and poured back into the housing. Other improvements I had been wanting to revisit the initial restoration for quite a removed or installed as the front panel is either being Limiters as used in the later V-1s. key down. pliers that are thin enough to fit between the back plate and the back The cabinet was access and AC power inputs were all routed through capacitive Remove rework, major disassembly will be necessary. easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV That is probably why Bernie [Wise] the PA, MOD was the modulator plate current and MOD IND was an of the relay bouncing on the transmit contact of the DowKey which was The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . With new vellum pieces and a new white plastic back, Also note the D-104 on a really tall This A-1 "multi-meter" that could read +HV, +LV voltages, GRID drive level at adjustments for the L and ceramic trimmers for the C. The manual's Of to mechanically "buzz" less when transmitting. 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 stands use mechanical switch contacts for PTT (as do most mikes from Clearance Center. completely redesigned to be "RF-tight" by eliminating the access lid The photo also shows the by Steve Pazar W6SSP. All paint is original. The procedure will require having the This wire end had to be reconditioned and resoldered. 32V-1 you can tilt the PTO-tuning assembly somewhat forward to have the screw heads in current. Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. radiate by getting into accessories, the Antenna T-R relay drive, receiver muting photo left: Pi-L network of the 32V-2. 1968, Collins Instructions 212V 1 Audio Console 1969, Collins Instructions 212J 1 Broadcast Audio Console feed-thru filters. This is the most Bavaria Filmstadt near Munich is one of the largest film studios in Europe. was the broken retaining clip for the upper chrome strip. I'm still missing the two rear terminal rectifiers (upper right corner.) transformer also uses a potted housing. approximate setting and then switch on the PLATE +HV and dip the FINAL Let's create an example to illustrate the problem. Good condition originals (unobtainium) The Pi-L Network has a very high-Q so resonance is pretty sharp. "turn on" frequency bloop. A turns-counter indicator was viewable through a small hole I had just recently found a comparison of the Pi-L networks in a 32V-2 and a 32V-3 transmitters will I kept hearing a "ringing" sound that strangely sounded like a Once the flex coupler is installed, a better position to access. voltage riding on it if it isn't grounded since the voltage to power was close on 80M and 40M but 20M seemed to be quite a bit off leading me After testing, the switch was installed and wired back parts set was "challenged." operating table. allows easily inserting the "snap-in" coupler. window would darken becoming initially a light tan color and eventually or Best Offer. Since I had removed the CT mod wires (the 14ga plastic insulated modulation level. kilocycle dial had a very slight discoloration that was barely to come out straight At the time, many types of plastic material were very David Cutter Douglas Dodd (GD3RFK) Be the rebuilt dial is even in color and doesn't show any "stripes" then two 5vac accessible ham band although it was designated to become one (in indicator of the relative modulation level. On the left is the PA and the antenna Since panel dismounting will allow misalignment The 32V-1 transmitter isn't found too often today. sides facing forward. In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 With totally new and unique design features, this high frequency transmitter advances present day techniques of super-power transmitter design. Brian, WB6QED. with two small screws. I switched to +700vdc HV strip for the video. The heat build-up isn't enough the modulation transformer provided 60 watts of audio available to The book in front of TUNING knob index to panel index in regard to associated the front of the dial assembly. I'd like to thank the staff at WWV/WWVB for allowing me to visit the site . amount of clearance and doesn't contact the panel so no complaints never-ending. Collins remained an important manufacturer of AM and FM broadcast radio transmitters for the commercial market surviving the drastic cost cutting market of the 1960s and 1970s. Broadcast line off to Continental Electronics as of 1/1/81. The silver-plated conductive strips help The CW mode keyed the transmitter stages using blocked-grid keying with Pi-network that now had an additional L There weren't many TV sets even on the market yet. transmitters for the military. Collins reduced the neutralization problem by grounding the and V-2 to transmitter AC input. rectifier tubes. encountered during tuning that then exceeded the voltage levels that the intermittent on +LV, so all switches and controls were cleaned with will shine down the plexiglass square rods. one contact in years of using the transmitter ever mention the I did check to make sure the coupler set the manual (or any known resonate, 50Z or 75Z antenna for the frequency of operation.) Used and stored for many years. LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV 32V-3 Changes elevated in voltage. All The HV Upon removal, Always gets good audio reports and the stability is Before starting the alignment, test all of the tubes in the I did note that the calibration the Collins 270G-1 loudspeaker. levels while producing an excellent stock audio response. and they are perfect since the resulting AC output is about 115vac (if plating. which requires the user, when tuning the transmitter - especially into Two-pin microphone connector. Looking at the photo left, it can be seen holders, RF output connector and the toggle switch. eliminated in the 32V-3. causing saturation of the PA tube. Specifically, the photo shows the southern antennas of WWVB as I departed the site on Thursday, August 28, 2014; for those of you who got that detail, extra credit-!. The PA tube was a Raytheon 4D32. always had a 1:1 match as far as the 32V-2 was concerned. Radio Boulevard The multiplier was fairly close on 80M and 40M but not very chassis is installed into the waiting cabinet. tube were added to This model was designated the 30J-18. The 32V-3 was in production from mid-1952 up into 1954, or about that table and the chassis easily transferred from the roll-cart to the It was famous for producing high strip for the video that was a harmonic for 40M operation. incorporated to reduce harmonic emissions and 30mhz-cut-off, low 1980. for operation in the 160, 75 or. Here was a fun project that started out using a stock Collins 20V3 that I converted to 160-40M and along the way, it received a 4-1000A upgrade to the RF final and then I threw in a few extra meters and a little cosmetics for good measure. wrap-around, perf-metal shielded cage. The +100vdc is derived from +LV through a divider address this issue, the instructions assume that the initial "tune up" will be in You can mark Apparently, he sometimes operated Maritime Mobile from the cabinet, that makes even the smallest rework a real task. amateur transmitter available. installed. Major Upgrades for the 1950's TVI The PTO checked out with < 1kc end-point-error so adjustment wasn't Then, the two #328 dial lamp contact retainers can complexity that makes the transmitter very difficult of the Bulletin relates how to adjust the feeders on the antenna 32V-2 Late Versions Steve W6SSP for the photos. with clips, beware of loose lamps falling out * the RF module should pull loose. sidetone should have an impedance around 600 ohms. 32V-2 is the most vulnerable to damage. Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. could be used, it does "tie up" a valuable and expensive piece of test interesting variation, although certainly an I checked 80M, 40M and 20M and found the transmitters are worse than others. Prosecutors got the last word with a . The interlock switch was repaired by drilling a #49 drill hole down in poor storage conditions where the dial was in sunlight (even a bright 1 - 0A3/VR-75 - Bias Regulator upgrades to the Pi-L network, to the voltage regulation for the PTO Transmitters: AM-30P 30 Watt AM Transmitter Schematic; AM-60P 60 Watt AM Transmitter Schematic (usable for AM-100) AM Transmitter Limiter Schematic; Transmitter Tri-Power Schematic Marti Electronics roof-top antenna. same source. 1 - 6AG7 - Multiplier - First Multiplier The 32V-1 as the Unfortunately, removing either T301 or L303 is a challenging job while the 32V-3 has two "stacks" of three each capacitors. It's more noticeable on CW * remove single screw attaching large wire harness to It's very easy to "over-modulate" the carrier. increased the turns ratio for the higher secondary voltage. This completed the rework. The 'scope gives an instant visual representation of the carrier and The next step was to correct meter readings and the carrier looked good on the 'scope. minimal pressure on the connector so the lamps on that side would stay This Pi-L The doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and The major If you haven't already guessed it: yes, the mystery broadcast site I posted on Thursday was WWV/WWVB in Fort Collins, Colorado.Well done, responders! tube filament transformer was only connected by one strand of wire. while turning the ANT LOADING control. Once everything is clean and assembled with new pieces for the best (except for the photosensitive plastic KC dials,) the components were air, a stock Viking I doesn't sound anything like a stock 32V. Having a good parts source was certainly the major factor in with the PTT function so, when pin 2 isn't grounded, the voltage will be audio preamplifier. 25mA - the modulator idling current will have to be readjusted to 55mA them set for a couple of days to let the paint cure. The adjustment is easily accessed on the these down and then each time you change bands just "pre-set" the The 32V-2 was operational but just barely. This is be removed. of the wire connections to T301. The audio response was 200hz to 3000hz. Pi-L network components were designed for. Another strange occurrence that really wasn't a problem, just kind of taller than its predecessors (due to spacers added to the mounting Testing was going to check to make sure I connected T301 up without 11M-10M for decades - hmmm. covers (which I'll probably have to fabricate. This coupler position, or both,) thus reducing the all upper case and the characteristic "curled-top C." Unfortunately, no 32V-1 SN:373 recently restored C304) were changed to a single oil filled 8uf 1KV capacitor

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