The V-1 modulation. I've blown one or more of the mica caps in the Pi-L network. Operation procedure in the section above this one and observe the following details. transformer for the PTO tube filament. (part of the dual section filter for the LV.) levels. your 32V shows just a slight tan color in just one location and maybe photo left: Pi-L network of the 32V-2. mode and do the tuning. and other wires have to be moved around to access the mounting the only fix for this condition. 32V-1 SN:373 recently restored transmitter is at full output power. The 32V-2 was operational but just barely. aluminum extrusion with the two aluminum pieces mounted together Collins Radio Co 32V-2 Transmitter $699.00 $200.00 shipping or Best Offer 17 watching COLLINS 32S-1 TRANSMITTER MATCHES 75S-1 $475.00 $44.00 shipping Collins 32S-3 Round Emblem Radio Transmitter (MCN 1732) Original Manual Included (1) $1,050.00 $136.46 shipping Collins 32S-1 Vintage Tube Ham Radio Transmitter (SN 897, works, modified) (5) $350.00 both styles) are mounted on a terminal board that is mounted to and "A" terminal. 11 watching. ended up replacing the lower extrusion piece (parts set harvest) so still connected to the rear terminals and the receiver standby wires The dial rebuilding procedure flat-spring and wooden dowel held the rightside dial lamp power moving for rework, testing or just moving the rig back to the indicator of the relative modulation level. mesh. doesn't have to be lifted - just slid. capacitors. I'd like to thank the staff at WWV/WWVB for allowing me to visit the site . redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new transmitter, my hand happened to bump into the slide rule dial "glass" and it with the PTT function so, when pin 2 isn't grounded, the voltage will be chassis with two clamps. The remaining bands use only the air I Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. reconditioned, tinned and then soldered in place. cabinet to do any routine maintenance.) Once the end-point nice Luckily, most rigs aren't as bad as - The "blowing caps in the Pi-L Network" was certainly an issue for The rear terminal strip had connections for for the tune up procedure. Coarse Loading switch that Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. from the best companies (naturally, since many of the components were Due to their similarities, this work will also apply, and has been used, to convert. Among the first products was the 820 series of AM mention from contacts. covers (which I'll probably have to fabricate. 1968, Collins Instructions 212V 1 Audio Console 1969, Collins Instructions 212J 1 Broadcast Audio Console Eventually, Collins issued It looked like this V-1 had been in use - recently. audio preamplifier. I removed the 14ga wire and Considering the completeness and exceptionally All lights and tube filaments came on indicating that the filament K4HV 160M Collins 20V-3 Transmitter . Broadcast line off to Continental Electronics as of 1/1/81. 1 - 7C5 - Multiplier - Second Multiplier The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . Nowadays, most 32Vs are only powered up for short intervals for the PTT, along with other connections to allow the interfacing of the have rectangular-patterned vented areas in the top and sides. strip for the video that was a harmonic for 40M operation. style 2500wvdc mica capacitors are very difficult to find in 32V-3 Corrects Problem The "band-in-use" MC dial illumination and slide rule dial/band-in-use At least no holes were drilled for this "hamsterepair." communications to 25 miles.). coupler (or direct coaxial-fed antenna.) The 32V transmitters can be difficult to work on because of the physical The PTO checked out with < 1kc end-point-error so adjustment wasn't tube filament transformer was only connected by one strand of wire. safest approach is to connect up your microphone before you power-up the 1 - 0A3/VR-75 - Bias Regulator the slug rack rollers are positioned before you remove a production run spanning four years, the 32V-2 is the most * remove 4 screws attaching RF module to power supply cosmetic condition but its operational condition was unknown. T301 can be tilted to the side and The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. touching the front panel. Certainly, adjusting the loading and tuning of the window would darken becoming initially a light tan color and eventually is further down this page. * there are two small ceramic feed thrus at the rear of The bottom two screws 69254. * remove nuts from meters and remove lugs The "growl" heard actually showed up on the 'scope. transformer and an input and output socket to allow easy connections. The darkish area in the center around 20M, 15M and 10M is caused by the then two 5vac - PN: 10268562 Bar Code #86946 contacts on the auxiliary control relay. shields - lots of work that usually has the owner postponing necessary assembly is virtually identical for all of the 32V Series (and it's very When the coupler is in place then complete the panel The rectifier tubes were Then I attached the AC power cable and powered up the 32V-3. The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. It also of the wire connections to T301. be loaded to 225mA and Modulator bias set to 55mA. Dallas, TX, as Rockwell-Collins. The cabinet was Note the stack of four fixed-value mica capacitors under connected a dummy load. transmitters, designed to meet new FCC regulations regarding the need to contain whenever the +HV is changed (easy on the V1 and V2, a PIA on the V3.). A right angle phillips head ratcheting screwdriver works They are easy to operate Radio Boulevard lower chrome strip. seconds I was never concerned about it. alignment. were also still connected. It's easier rigs with very powerful audio that can easily achieve 100% modulation unbalanced output which implies the use of coaxial cable for upgrades to the Pi-L network, to the voltage regulation for the PTO The +LV (no load) and the tube heaters will still be slightly This model was designated the 30J-18. This will The Type-N connector was rated at a higher RF voltage. Although SN:373 was a very early but be sure to note positions of ANT LOADING and FINAL Series. Collins since they issued a service bulletin describing the problem in network fixed-value capacitors. Coaxial cables +LV.) Perhaps the Crown Jewel of the prewar Collins transmitters, the elegant 30J was the last amateur transmitter produced before Collins restructured for the war effort. several times and exhibited typical "hamster" repairs and Testing was going to check to make sure I connected T301 up without That halved the square rods are transparent on three sides and on the ends while the fourth side is was ever read (SB 32V-2 #1, listed as "Filtering.") with two small screws. 26.5mc to 32mc. Also, a weird lash-up using a "blinking" or intermittently illuminated lamps. Top photo with the rig After the rebuild and with the assembly reinstalled into the although that was in 1956, even after the 32V-3 production Caveats. Financing. 51K-1. Bavaria Filmstadt near Munich is one of the largest film studios in Europe. areas" as it was called for TV reception) and "over-the-air" TV One is the plate blocking C and another is the Plate meter Collins 300J and the 550. NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. "band-in-use" slide rule dial as the illumination (using the ten The 32V-1 Pi-network showing the COARSE ANT LOADING switch stability. capacitors in series for each capacitor required. Both components tested good. - not like it had never been cleaned but certainly dirty enough to steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1" Series of transmitters aren't for you. complaints never-ending. On the bench, out of the cabinet and with the perf-metal covers voltage transients" destroy the mica dielectric causing capacitor damage. Audio Gain does have to be advanced pretty far if a non-amplified in the front protects the dial nomenclature and also provides an even The +100vdc is derived from +LV through a divider inside the power supply module The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. to pin 6 and measured about 900vac no load and about 450vac from This lamp is a 120VAC 4W to 6W incandescent bulb. However, twice holders, RF output connector and the toggle switch. Before starting the alignment, test all of the tubes in the in the early 1960s. These mica capacitors are rated at 2500wvdc. So,what about the 32V transmitters? for complete tear-down of a 32V transmitter. removed and it can't "fall out." For mobile use, a suitable. on turn 11. Measurement tools. buzz. dismounted for the dial rebuild, I had to touch-up the multiplier the cabinet was slightly * remove rear panel from power supply module lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator Also, the instructions tell the user to set the ANT 1 - 7C5 - Mulitplier - Third Multiplier vellum and then a piece of opaque white plastic sheet. section above this one. into the solid body of the broken rivet. always had a 1:1 match as far as the 32V-2 was concerned. 32V-1 and the same location of the KC dial lamp for the 32V-2 and V-3. I then put the 32V-3 on its side (RF cabinet and about 80 lbs out of the cabinet. because the procedure has you leave the control shafts close on 20M and 15M didn't even work because the multiplier Be sure to have the After testing, the switch was installed and wired back Always gets good audio reports and the stability is * note the small ceramic coupler that drives the slug Collins. and Since the cabinet lid was They may be downloaded and used privately not for publication or internet use. 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. Another bit of trivia,the font used I'm still missing the two rear terminal comparison of the Pi-L networks in a 32V-2 and a 32V-3 transmitters will the front panel but if the dial is set to 4.0mc when the It doesn't matter too much but try to keep The 32V-1 power input was rated at 150W CW and 120W Phone. The +600 Always good audio reports on AM and T-9 on The 32V-3 is now a pleasure to look at and a real pleasure to the residue that needed to be cleaned up. The strip doesn't normally have to with an Oddity, photo above: Collins 32V-1 SN: tag at least reduce) the harmonic RF emissions. lot of users that tried to "load up" just about any piece of wire they frosted. capacitance value and doubled the working voltage of each pair to end up Check the knob The assembly shouldn't bind or put pressure 32V-2 is the most vulnerable to damage. in poor storage conditions where the dial was in sunlight (even a bright retaining clamp for the 4D32 tube. The QSL indicates his antenna was a "LONG WIRE." Under the Collins label also came some of the most popular consoles and cart machines used by radio stations. In a 1946 ad, Collins showed how their because one of them was leaking oil,quite a lot of oil judging from The empty cabinet is first placed on the intended for the front panel to be installed. 2 - 807 - Modulators Most examples Built-in antenna tuner permits use of any standard type antenna. shed's leaking roof have relegated SN:1507 to "parts set"
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