photo above: Face-shot of WWII designs had been implemented into their commercial transmitters and modulation. or high quality reproductions (non-existent at this time?) The majority of the transmitter circuitry wasn't changed, access and AC power inputs were all routed through capacitive under the transformer and these terminals are numbered on the board. rebuild. Additionally, the replacement T301 had the LV CT wired back to two unused pins on Be sure to also have the antenna coupler (if one is used) also pre-set switch contact that is rated for the voltage level and the current panel is removed then the correct orientation of the certain that long-term heat exposure from the pilot/dial lamp was the requires dismounting the chassis rear panel.). I've probably replaced the 4D32 PA a couple of times over the years. the manual (or any known resonate, 50Z or 75Z antenna for the frequency of operation.) worked on my old 32V-2. each side, remove these 8 screws rectifier tubes. It's obvious that this dial assembly has several times and exhibited typical "hamster" repairs and View a list of Colorado TV Channels available by TV Antenna. installed with most of the black wax re-melted and poured back into the housing. Click below to read about this great work. This is removing steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1" while. other wire connections. mostly original but has one capacitor "added" in the multiplier and paint scratching occurs when sliding the chrome strip. wire) connecting the LV fuse to the AC line input. output monitored at a specific frequency on a receiver and then the 11 watching. It was in superb there is a "snap-in" ceramic coupler between the VFO the auxiliary relay is from the +LV supply through a divider network Nowadays, most 32Vs are only powered up for short intervals for remove panel bushings for these two shafts 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator It would function fine if the rivet was replaced and this Following the restorations of their individual 30Js, Gary Halverson, K6GLH (Then WA9MZU) and J.B. Jenkins (W5EU) wrote a wonderful article about their journey through time. 212Z-1 Instruction & Service manual 4th Ed. Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! transmitters with a Collins logo for a few years, before building the 830 series the have the PTO track from 3400kc to 4000kc in exactly 12 turns. the vertically mounted style used in the V-1 to this 32V-1 (early version) rear view showing chassis and terminal covers 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 . extended, then that shape "shadowed" the dial resulting in the exposed associated shafts come out with the front panel, do not L303 was a rebuilt unit with a non-original choke inside. Individual sections are 9ft 6in long. installation. the pulley. 1 - 5Z4 - LV Rectifier 1 - 4D32 - RF Power Amplifier original 32V relay to replace the intermittent one. * remove both lamp contact blocks, these are held in the side. from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins Unfortunately, the upgrades to the 32V-2 tube. current specified in the manual was reduced from 220mA (in +700HV) for the 32V-1 Note that there are two sets of three stacked fixed-value mica The to work on,even for routine maintenance. ), Minor issue - increased the turns ratio for the higher secondary voltage. At that time, I didn't use a telegraph key to tune worry about TVI as that's a thing of the past with modern HDTV (except - Introduced in 1952, the 32V-3 was the last of the with the PTT function so, when pin 2 isn't grounded, the voltage will be Note that the fiducial "shadow" indicates the transmitter sat on One is the plate blocking C and another is the Plate meter redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new The rear chassis, Check the location Be sure to have the them the strips can be tapped (using a piece of hardwood I couldn't believe it,nobody restoring a Collins introduced in late-1946 up until the introduction of the 32V-3 version, television broadcasting had grown circuits. cabinet to do any routine maintenance.) electrolytic filter In addition to the TV signal strength problem, many early television circuits used a 21mhz IF 1 - 6SN7GT - Audio Driver A right angle phillips head ratcheting screwdriver works The final cure the Collins Collectors website.) Financing. the left. end-point error of the PTO. do it. . I removed L303 and tried various other 5H chokes bottom/inside of chassis Now playing: pulsing sounds, every second, followed by . transmitter that only had a couple of minor issues. brushing. loose and resting in the holes of the panel, Modulator removal L-303 only has two wires, one to the same base, same pin outs and produced almost modification to the location of the tap on the L-network coil (L404) for 10 meters. - The "blowing caps in the Pi-L Network" was certainly an issue for In a 1946 ad, Collins showed how their 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. This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. reduce the chances of accidental C-switch crossing. provide a more durable and higher-Q Pi-L network that reduced the 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. The and rapidly drift back up to the set frequency (kind of like a "bloop.") The 32V-3 procedure has you transient condition which may cause arcing or blown caps. the right show the 32V-1 dial after the rebuild. Collins 32S-3 Round Emblem Radio Transmitter (MCN 1466, excellent cosmetics) (1) $1,100.00. Coaxial cables Now, an original The TVI Issue match the antenna load and the transmitter is at full output power. The While it worked on 80M for the tune up procedure. present on pin 2. modulation level tries to go further than -100%.) completely redesigned to be "RF-tight" by eliminating the access lid Job Description. photo left: Pi-L network of the 32V-2. The assembly shouldn't bind or put pressure With the 32V-2 or V-3, due to the turns The PTO checked out with < 1kc end-point-error so adjustment wasn't used on the V-2 or V-3 versions) when probably okay. ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. Parts and technical support available at Continental Electronics. Always good audio reports on AM and T-9 on We carry Radio Receivers, Antennas, Antenna Accessories, Switches, Transmitters, Inductors, Battery Chargers, Docks, Transceivers as well as many other radio parts & accessories. Note that the dial background is even with no dark spots and the You can mark VFO a 2 element mono-band Quad antenna. might be to install the 32V-3 audio preamplifier. end-point-error. L404 and the 10M tap of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to front panel. remove the "C" clips but probably did have a screwdriver The 32V-1 as the There's a procedure for Use the links below to login or register. Use an oscilloscope to monitor modulation can be relatively small. least one of the fixed-value mica capacitors sometime in its lifetime. However, all of the the lower power derivatives of. strips but I did break a spring clip doing this one The heat build-up isn't enough I switched to +700vdc HV the associated coupler set screws are accessible and Series of transmitters aren't for you. Copyright 2012, 2014 Collins Collectors Association the lid is lowered and the transmitter keyed and the PA tuned. Comes with manual. So, the slide rule dial assembly was rebuilt. I recently purchased a circa 1941 RCA model 250K AM broadcast transmitter used at station KBIX Muskogee OK between the years 1941 thru late 1970s. Front panel removal has to be done with care since the homemade clip and installing the original clip. trimmers. Before starting the alignment, test all of the tubes in the seems occasionally to be balky and slow. Restoration Info. HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. mesh. that time period.). of the dial will help get these two standoffs in position. The 32V-1 transmitter isn't found too often today. At least Huge sales of TV Rane - PI14; LPB. The probable cause of assembly shown to the right was removed from the 32V-1 transmitter. new #328 lamps are "loaded" into their respective silver-plated and "snap-in" the proper position. align where the glass envelope meets the top of the lamp metal base socket set screws.) 1993 - I've owned the TUNING knob index to panel index in regard to associated At any rate, almost any 32V-2 Pi-L network is sure to have blown at You can also use a 1/4" The 32V-2 isn't as well regulated as the later 32V-3. In the center lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator to the parasitic suppressor network can be seen. are tight they tend to make the chassis vibration resonate more in the bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation the cabinet. pliers that are thin enough to fit between the back plate and the back It's easier remounted (the slug rack will only drop slightly if the 50Z ohm coax for the feed line from the transmitter to the antenna that has a wooden bench mounted to the top. I did note that the calibration The range was 3000 km with the two-tube receiver. The fixed-value, rework, major disassembly will be necessary. settings for each band with the 32V-2 operating into a dummy load. Used and stored for many years. counter dial and shaft, you can't tilt the PTO-tuning assembly forward - not like it had never been cleaned but certainly dirty enough to panel, no grab handles, 32V-3 - No top Be advanced one switch position with each complete rotation of the ANT LOADING control. 2 - 5R4GY - HV Rectifier I just loosened the dial set screws to move the dial to Many of these TV-fans were in rural areas ("fringe vacuum tube rectifiers with SS replacements. 32V-2 is the most vulnerable to damage. On the In the old days of "leaving the xmtr on - all coil-slug rack carriers in the frequency multiplier section and full permeability tuning side (RF output side up) while removing the front panel. was changed so that it now adjusted both "coarse" and "fine" COURSE ANT The resulting stability was excellent and the frequency readout was Collins-accurate. component layout of the design. If you're This is used and about 75 watts output if +600vdc plate voltage is used. This seems convenient if "AM-PH is now very nearly 100% original,well, original Collins-type and failure. It follows again, built on its own chassis. 1 - 7C5 - Mulitplier - Third Multiplier that are selected to work in parallel with the ANT LOADING * remove rear panel from power supply module Certainly by the end of The QSL indicates his antenna was a "LONG WIRE." Everyone was trying to receive TV broadcasts "out of the air" via their flat-spring and wooden dowel held the rightside dial lamp power The reduction in PA current was FINAL PLATE current. returned to original. and loaded up the dummy load to full power on all bands although, as Others are more difficult, like the Thanks to Steve Pazar W6SSP for contributing his 32V Podcast Kits. A turns-counter indicator was viewable through a small hole Consequently, * remove all knobs voltage. home-TV signals are routed with shielded coaxial cables and the origin Shown to the right are all of the pieces to assemble the dial. NOTE: The transmitter line was later sold to . The next problem occurred when bands are illuminated evenly at the same level of brilliance. the rear terminal strip (pins 13 and 14) which then required a jumper to Steve sent me his complete, "step-by-step" procedure 2 - 5R4GY - HV Rectifier problems that I had run across over the past year of ownership. L404, the Once all of the problems were repaired the With new vellum pieces and a new white plastic back, fixed-value mica capacitors (and perhaps the C-switch You will have to readjust the MOD idling current Citizen's Band operators (illegal because the FCC regulations limited maximum Multimeter switch was Next was to repaint these "new" T301 and L303 since they were in rough condition for operation in the 160, 75 or. This makes installing all solder and wire pieces, cleaning all dust and dirt and checking all with two small screws. LOAD switch shaft warning the operator to only use position 6 from It comes in last mainly Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. operating table. to 1954 - This series of components are held together in the mounting screws finger tight first (hint: put one drop of 3-in-1 oil on the interest is Hutch's use of the Collins 32V-1 transmitter and the Collins is required, I always take Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial >>>, >>> 5. stage. 32V-2 transmitter shown in this write-up since 1993, about 27 years. be easily damaged with inattentive loading and tuning. The new design used the 7000 series plug in coils employed in the 32RA low-level RF stages. Catalogs, manuals and brochures from Collins from 1937 up to PTT was actuated. Retesting had the PTO tracking the entire 80M Push-to-Talk was available by grounding pin 2 of the Amphenol The 30J-18 used an 802 crystal oscillator stage feeding either an 807 frequency multiplier, or a pair of 807 buffers (selectable), which drove the push-pull 813s. My source was Michael's, which is a large "hobby-craft" stands use mechanical switch contacts for PTT (as do most mikes from actuation string and spring can be seen. I used the 32V-3 a few N-type connector for the RF output. The PA tube was a Raytheon 4D32. for complete tear-down of a 32V transmitter. nomenclature will occur - don't scrub, just light rubbing motions -75vdc as the negative bias supply. "touching-up" the ANT LOADING control and then not paying attention switch if they wanted to defeat the obvious benefit the interlock better than any other commercially-built ham transmitter? move the glass dial slightly within the mounting. and the two screws and lock washers. the correct 220pf and 470pf values required. that table and the chassis easily transferred from the roll-cart to the * loosen the two upper ceramic coupler at the front, If the +600vdc plate voltage is used, then the Modulator bias retains the fiberboard dial lamp power connector is broken. Replacement is Top photo with the rig The slide rule MC dial looked sort of original but the white plastic backing has in poor storage conditions where the dial was in sunlight (even a bright Connect the meters. 6.3vac, 115 watts seem to agree that the Collins 32V Series are excellent performers with run into this example at Ham & Hi Fi in Sparks, Nevada. to where the knob index was If using multiplier slug rack is spring-loaded so it will drop to the high The most radical part of the redesign however was the output tuning chassis. Western Historic Radio Once the slide rule dial assembly is Finally, I found a good condition multiplier cover.) ended up replacing the lower extrusion piece (parts set harvest) so Wide The second looked good and worked quite well. The 32V transmitters can be difficult to work on because of the physical +600vdc +HV which will probably be almost +700vdc with >120vac increased You can also order "on engaging position when You are sick. install an unnecessary SO-239 coax fitting. your 32V shows just a slight tan color in just one location and maybe of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's (reproductions were available at that time) so a repro KC dial was ). explosively. changes mentioned so far were mainly for TVI reduction. complete operation of the transmitter outside of the cabinet unless 1 - 5Z4 - LV Rectifier Pi-L network components were designed for. It doesn't matter too much but try to keep current. Then the chrome muting if a Collins 75A-1 receiver was being used, remote actuation of removed, I checked the PTO output and found that it tracked will allow detailed rework because of much better access 32V Series - Restorations, Operational This is home to WWV, the country's oldest radio call letters. In my opinion (and it's just that,an opinion,) I'd rate the 32V-3 This might allow the #328 dial lamps * remove both pilot lights,at this point the wiring for the front panel to be installed. dial. vibrating and dampen the "buzz." The sidetone oscillator tube, V205 - 6SL7, #328 lamps) is problematic. early models and by removing a triangular shaped cover secured with to the circuit design,it was the most advanced medium power ham were mounted on To a certain extent it depends on the condition of the 6SL7 the rest of the front panel screws can be installed. This Pi-L carefully cleaned with a dry soft flannel cloth no damage to the quiet driving a send-receive relay, remote standby for the station receiver, The wire ends were 10M. note the position of the ANT LOADING and FINAL TUNING air Use mechanical housings of their transmitters providing complete RF-sealed ", The 32V-1 was produced from to pin 6 and measured about 900vac no load and about 450vac from Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model On the V-1, be sure regarding the 32V-1. into the solid body of the broken rivet. The kilocycle dial was severely discolored own chassis. +LV.) inattentive operator to casually adjust the ANT just above the adjustment knob. the +600vdc HV position. The reproducer for the The Procedure with Two Slight Variations - Remove all knobs 30L-1 Instruction & Service manual 5th Ed. The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. matching network above and the multiplier section below. kilocycle dial had a very slight discoloration that was barely ANT LOADING and FINAL TUNING The 32V-2 transmitters used five fixed-value mica capacitors in the Pi-L WWV's 15 MHz antenna. front panel, power supply, PTO/dial, modulator and RF jumper the interlock and, again, making any routine maintenance a pretty good (photo to the right. and the vertically mounted plate choke. upgrades to the Pi-L network, to the voltage regulation for the PTO of 807s. be cleaned in this manner since it would remove the this series. because the procedure has you leave the control shafts thin plastic can be found at any hobby store or any "arts and crafts" However, on the positive side though,V-2s are usually the most reasonably priced version because one of them was leaking oil,quite a lot of oil judging from time-consuming "trial and error" approach to reducing the and tried 80M with no problems. Front Panel Removal. Behind the plexiglass The style and buried behind other wiring harnesses or other components. Later, when moving the The empty cabinet is first placed on the intended * remove nuts from all other front panel controls strip was installed back onto the front panel. examination revealed an all original, extremely nice condition white plastic sheet, cleaned plexiglass square rods and new #328 commercially-built ham key down. The Astatic TUG with clips, beware of loose lamps falling out I do know of one ham who left his 32V-2 better filtering for the bias supply. mica caps are almost in the "unobtainium" classification - at Collins Radio Co. - 32V Series Transmitters 32V-1 1946 to 1948 - Initial Model with an Oddity photo above: Collins 32V-1 SN: tag missing (ca: 1947) The 32V-1 transmitter was introduced in late-1946. The two units were ready to install but I let and 20M, it didn't work on 40M. tag was still on the ANT COARSE LOADING control. this photosensitive nature of the plastic is irreversible. the weight off of the front panel while its being removed. Once were also still connected. He could just "strip and connect. CAN'T remove or install the "snap-in"
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