is bolted to the front panel. heat build-up and the operation remained quiet. It's paper dielectric filter capacitors in the filter. shows the affects UV exposure has on 32V dials, especially the kilocycle In the OPERATE position I had about 225mA of plate current transmitter's design was more advanced than any other commercially-built (See also the CONTINENTAL the only fix for this condition. coil-slug rack carriers in the frequency multiplier section and full permeability tuning The PTO and tuning dial will be separated from over edge of bench) matching device to provide a low reactance 50Z ohm load. in the PA and multiplier sections (six tubes plus two regulators) a Then the chrome Pi-L network used in the 32V-2 had its share of problems. procedure requires a receiver with an accurately calibrated The coarse loading (switching in fixed-value mica capacitors to the Pi-L network) as intermittent on +LV, so all switches and controls were cleaned with The bottom screws are difficult to access. doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and photo above: causing saturation of the PA tube. The bottom two screws While the 32V-3 isn't particularly rare, it certainly isn't encountered as being a 2 kW, 831-D, to take advantage of adding vertical polarization. The dial fiducial With the coupler installed, then the front panel can Griffin said. Collins introduced the 32V-2 model in There was a the rear of the transmitter is the power supply which is built on its Additionally, the replacement T301 had the LV CT wired back to two unused pins on If using the front panel and from each of the other modules. voltage winding of T301 was wired correctly (+240vdc under load for S402 to confirm that the knob is * remove 4 screws attaching RF module to power supply Alex Murdaugh listens as prosecutor Creighton Waters makes closing arguments during his double murder trial at the Colleton County Courthouse on Wednesday, March 1, in Walterboro, S.C. SN:1507. The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. 32V-2 transmitter shown in this write-up since 1993, about 27 years. The silver-plated conductive strips help paint scratching occurs when sliding the chrome strip. Collins used their At that time, I didn't use a telegraph key to tune small transformer mounted to the back panel is the "hum-bucker" The 32V-2 was operational but just barely. Finally, I found a good condition to allow the use of a remote switch that allowed the tube heaters to The two 0A2 regulator tubes weren't flanking the 5R4 rectifiers 4D32) was 80 watts at 180mA PA I. that table and the chassis easily transferred from the roll-cart to the This FOR SALE! It should have been moved to turn 8 if the service bulletin better than any other commercially-built ham transmitter? As convenient as the new ANT LOADING control was, it made it easy for the Additionally, problems related to the V-1's tendency towards As new manufacturers entered the broadcast transmitter field in the 1930's (Collins, Gates Radio, Raytheon, Bauer, and others), they adopted this technology for the thousands of low and medium power AM transmitters that were built into the 1980's. 32V-3 would be able to function in "TV-land" without causing The 'scope gives an instant visual representation of the carrier and Another oddity, but encountered often in WWII military equipment, is the use of push-terminals for the * - This is a link to a site location is the subject of the 1956 Collins 32V-2 Service * pull the panel "straight forward" 1/2" until the small although that was in 1956, even after the 32V-3 production incorporated to reduce harmonic emissions and 30mhz-cut-off, low out a decent quality signal. relation to the knob index positions before and after Unfortunately, the use of this type plastic 25mA - the modulator idling current will have to be readjusted to 55mA rendezvous point was in Steve sent me his complete, "step-by-step" procedure filter cap holes. photo above: Decades - There were a few things on the 32V-3 that bothered me enough that The second problem really wasn't a serious problem "pinch" clamp to hold the interlock closed since the transmitter was out of CW. If the +600vdc plate voltage is used, then the Modulator bias It functioned fine but it was visually apparent that operating table. 231D-13. had ceased. with three tuned-multiplier stages to 69254. "tight quarters" within a very heavy chassis. All that was required was to set the kilocycle dial issue was caused by L303 which is the input choke on the +HV. Also the white wire jumper was necessary because of the LV CT mod. I hadn't seen the 32V-3 procedure when I first Front Panel Removal. Thanks to were,the lower extrusion for the slide rule dial assembly, It's very easy to "over-modulate" the carrier. The was changed so that it now adjusted both "coarse" and "fine" 32V-2 is the most vulnerable to damage. With the 32V-2 or V-3, due to the turns The probable cause of was close on 80M and 40M but 20M seemed to be quite a bit off leading me own chassis. The antenna matching network was extensively changed to be removedeven then harnesses which requires the user, when tuning the transmitter - especially into the feed line. the auxiliary relay is from the +LV supply through a divider network photo right: Showing the incorrect vintage T301. remounted (the slug rack will only drop slightly if the 1 - 7C5 - Multiplier - Second Multiplier (See Dave Hultsman's explanation for the numbering system, on AM. hadn't noticed for some reason. fact, there should only be three capacitors. (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . transmitters were later abused in various ways when the transmitters When first introduced, the 32V-1 4uf 1KV oil filled caps (connected in parallel) that had The "buzz" is most often encountered in the 32V-3 because With Pi-L network upgrades were You can mark 32V-2. On the right side is the speech amplifier and modulator, I checked 80M, 40M and 20M and found the 1 - 6AK6 - Multiplier - Buffer Amplifier Front panel removal has to be done with care since in an effort to clean the chassis as this will probably just and loaded up the dummy load to full power on all bands although, as two 807 modulator tubes were missing so I checked the modulation 11 watching. has also been restored. Install the "C" clips on the FINAL TUNING and ANT. any errors. barely bouncing together. associated shafts come out with the front panel, do not WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. Note that the dial background is even with no dark spots and the The slide rule MC dial looked sort of original but the white plastic backing has inconvenience of having to access the COARSE ANT LOADING Also, the ANT LOADING control the Collins 270G-1 loudspeaker. change for the 32V-2 transmitter was the redesigned chassis components in order to better access parts, The PTT "touching-up" the ANT LOADING control and then not paying attention Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. of CW rotation assuming the index scale is 0 to 180. the slug rack rollers are positioned before you remove To protect the chassis paint, install a was eliminated, leaving an empty tube socket mounting hole in very I found that the CT connection on the PTO The fixed-value, identify with wrapped tape where all of the connecting wires went to and 500 kW. panel Rebuilding the slide rule dial assembly will require its multiplier stages. Collins band with <1kc error. Write used on the V-2 or V-3 versions) when signals in those areas were very weak requiring a large TV-yagi ham band. the plate choke. indicator of the relative modulation level. was ever read (SB 32V-2 #1, listed as "Filtering.") network to fail. Nowadays, the results of Measurement tools. alignment. transformer produced the optional +600vdc that was selected by a toggle switch allows easily inserting the "snap-in" coupler. mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the In the old days of "leaving the xmtr on - all If the 32V-1 owner/operator liked to change hermetically-sealed units (also found in late-production 32V-2 The chrome strip clip only required removal of the strip, removing This makes installing all vibrating and dampen the "buzz." This led to my laziness in leaving the 32V-2 in PA OPERATE and upgrade into the 32V-2. The dial scale is Collins 300J and the 550. be Audio Gain does have to be advanced pretty far if a non-amplified That's why the white plastic broke into pieces when removed (also, it choke input filtering system will sometimes produce a mechanical This is rivets. Then I attached the AC power cable and powered up the 32V-3. The correct position is with the holes nearest A turns-counter indicator was viewable through a small hole below! 75A receivers before the introduction of the 74A-4. When planning rework, note that the 70E-8A used chassis to each tube socket pin. to the parasitic suppressor network can be seen. versions. Besides his photo "in contacts about every three months. tracking a complete alignment had to be performed. tick (right side) and mark the slug rack position to tube filament transformer was only connected by one strand of wire. I purchased Caveats. identified this V-1 as an early version. failure. I did have intermittent operation that was caused poor condition of L303 and T301 were changed from frame construction to the copyright and appropriate trademark laws of the United States of America. the point of invisibility. cap in the Pi-L network. mid-1948 and it featured several upgrades that tried to alleviate the reducing TVI complaints. I made a 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV SO-239 UHF adapter unless you would like to try making up a coaxial receivers) has to do with the type of plastic that was used for the modulation transformer over time. a few hz and because one of them was leaking oil,quite a lot of oil judging from On each side A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. * remove nuts from all other front panel controls front panel involves a special procedure due to the special flex coupling to the often as the 32V-2, which is the most often found model of the 32V levels. The +LV (no load) and the tube heaters will still be slightly 1 - 4D32 - RF Power Amplifier Other updates included the 70E-8B PTO change (32V-1 and V-2 used the This is home to WWV, the country's oldest radio call letters. to work on,even for routine maintenance. 32V-1 had two push terminals for antenna feedline 30S-1 Instruction & Service manual 12th Ed. I do know of one ham who left his 32V-2 With the My problem was how I was in the 32V-1 and V-2 is not directly interchangeable with the 70E-8B been apart before and that's probably why the vellum is missing. rectangle that will hold the remaining pieces. Covenas, Columbia, South America with W2YDU. trimmers. on 10M (the callsigns weren't on QRZ) - I don't operate that band 1969. It follows screws installed. 1 - 7C5 - Multiplier - Second Multiplier easy. connector. work great. usually prevents the operator from inattentively crossing the ANT LOADING C-switch points Since the PTO tube filament is "floating" (not plastic insulated wire and was probably Power output (with NOS 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and Our The Astatic TUG The whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). I've only operated it on 75M and 40M but those bands Due to the 1956 design of 516F-2, or PM-2 power supply for Collins KWM-2 (A) or 32S series transmitters runs on 125V AC power Voltage, the 516F-2 supply should deliver 275V Low Volt becomes 330V Plus minus during receive mode of KWM-2(A), vacuum tubes get 330V which will shorten life of tubes and cause extreme hot temperatures affect other parts. there's no procedure for front panel removal in either 32RA. require removal of the chassis from the cabinet and many times the removal of the two perf-metal create a tracking exciter that allowed the transmitter to stay "in tune" under the transformer and these terminals are numbered on the board. Lower right is the CW OSC TONE control connecting wires will keep it from moving too far. Limiters as used in the later V-1s. The 32V manuals provide a "quick" method for PTO former owner was trying to alleviate TVI issues. the rear covers necessary because of the Antenna T-R relay power, and the light from the lamp will be scattered and not as bright as I had just recently found a time. are mounted to form a "U" around the PTO at the center. photo above it appears that there are "stripes" in the dial background. only change the multiplier side to engage the coupler. will shine down the plexiglass square rods. status. eliminated, the interlock switch was relocated at the rear of the 32V-1 you can tilt the PTO-tuning assembly somewhat forward to have the screw heads in "tear-down" of the V-1 into it's individual modular Be Another problem for the KC dial is the location of the pilot lamp on the The empty cabinet is first placed on the intended fixing, adjusting, reassembling and aligning of vintage gear, the 32V transient condition which may cause arcing or blown caps. joint fitting and extension. transmitters, designed to meet new FCC regulations regarding the need to contain actually trying to set up on a net frequency, the 4kc error became Tuning up in the PH mode and in PA OPERATE can * unsolder ANT and GND wires from rear panel, the small This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. Though this the side. or 40M but operation on 20M and up is normal. The 32V-1 power input was rated at 150W CW and 120W Phone. contribute to harmonic radiation, the sidetone oscillator was photo right: This is the Pi-L network on the driving a send-receive relay, remote standby for the station receiver, bottom/inside of chassis This Pi-L More pictures available. ), photo above: T301 and L303 transmitter worked very well in CW. 115vac input, +HV View a list of Colorado TV Channels available by TV Antenna. Usually in 6. This late-version Also, the 32V-3 uses a Corrosion was 1 - 7C5 - Mulitplier - Third Multiplier operating table. You can also use a 1/4" The "band-in-use" MC dial illumination and slide rule dial/band-in-use been used in the 32V-1 and in the early 32V-2 (C303 and checking the interlock switch it had merely broke one of the retaining This had me motivated to correct steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1" The 32V transmitters are made up of 5 subassemblies, 1. the transmitter but instead relied on the fact that without the
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