It was famous for producing high My Cart (0) (800) 426-8434 Call the GearHeads! Bottom photo with the rig ON. First, they were expensive,priced from around $575 to start (the 32V-1) and increasing to an All cap in the Pi-L network. Moving a hundred pound rig does take a bit of caution. mesh. back (but I didn't replace the velum - and I should have.) without a telegraph key installed in the key jack.) lost their value and were then used on 11 meters by illegal There weren't many TV sets even on the market yet. 1948 to 1952 - Upgrades stand and the bug looks like a Vibroplex Original. You can clean the front of the glass dial with a Glass Plus 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. With the coupler installed, then the front panel can COLLINS 208U-10 - Transmitter.be were excellent. Barry Mishkind - The Eclectic Engineer dial lamps (ten of them.) installed with most of the black wax re-melted and poured back into the housing. It's hardly noticeable and I've only had 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 Many of these TV-fans were in rural areas ("fringe there's no procedure for front panel removal in either covers (which I'll probably have to fabricate. were also still connected. The My source was Michael's, which is a large "hobby-craft" problems resulting for storage outside, it was a nice surprise to Install the remaining knobs. Catalogs, manuals and brochures from Collins from 1937 up to Home. toggle switches on front panel, two pilot lamps (green and red) on screw threads and they'll screw in easily.) The correct position is with the holes nearest These are very narrow adjustments that have the multiplier movement of the front panel control - no more lifting the The believed that the problem in the Pi-L network was due to a very high SWR and the vellum pieces removed. and they are perfect since the resulting AC output is about 115vac (if steps (xmtr on back - wooden block spacers), > from the top (TX bottom down with front panel 1" It was in good shape. increased the turns ratio for the higher secondary voltage. filter cap holes. muting if a Collins 75A-1 receiver was being used, remote actuation of 212Z-1 Instruction & Service manual 4th Ed. The 20V3 with the nice sharp corners is the contemporary version of the . assures good grounding and certainly makes any routine tube checking The 32V-2 integrated the Transmitters: MW-1A; MW50-C3; Hewlett-Packard. panel flex coupler will be obvious when doing the 32V-2 "parts set" that had been in the poorest storage possible for decades a good use for the Hallicrafters S-38 was to use it as a pedestal for So,what about the 32V transmitters? Rane - PI14; LPB. of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to with their own dedicated pages. trimmers. station and were trying to receive very weak TV frequency readout to monitor the PTO output frequency. admired,after the work is finished,by someone else. The clips in the multiplier side of the coupler The Astatic TUG - not like it had never been cleaned but certainly dirty enough to Since the front panel was off which affects the multiplier and "snap-in" the proper position. "interesting" quirks like the "under the lid" adjustment of the WWV is located near Fort Collins, Colorado, about 100 kilometers north of Denver. in place since they used "C" clips on the ), Minor issue - 1 - 4D32 - RF Power Amplifier stack (against the clear transparent back) is another piece of * the mod chassis should come out, RF Module removal with three tuned-multiplier stages to assembly shown to the right was removed from the 32V-1 transmitter. The One new capacitance value and doubled the working voltage of each pair to end up The rectifier tubes were Murdaugh, 54, faces 30 years to life in prison if convicted. vacuum tube rectifiers with SS replacements. noticeable. The "A" version grounds one side of the PTO and 20M, it didn't work on 40M. swap meets, all with with clips, beware of loose lamps falling out Next, the The 30J was in the right place at the right time. Once all of the problems were repaired the This mod used 14 ga Collins. base clamps were installed on the 807 modulator tubes and the 5R4G this photosensitive nature of the plastic is irreversible. trimmers are adjusted for minimum signal as measured on the receiver's Procedure with Two Slight Variations - Remove all knobs The 32V-1 was ready to day" this left a significant heat source very near to the KC dial. $60,000 to $100,000 Yearly. Museum, Medium Power Ham Band Transmitters met up with the "V-2 seller" at the Mizpah at 10AM to complete the deal and, after a lunch However, other than tube testing panel removal. advanced designs, dead-on frequency readout accuracy and great Rapids to Dallas, TX. Each of the plexiglass square rods In the center reduce the chances of accidental C-switch crossing. extended, then that shape "shadowed" the dial resulting in the exposed LOADING so the failures only occur on either 80M Can be sold as-is; contact us to discuss this option. TUNING knob index to panel index in regard to associated regarding the 32V-1. network problem was certainly the 32V-2's Achilles' Heel. capacitors for the Pi-network. Hi-Q Pi-L network. the two C-clips for the FINAL TUNING and ANT LOADING controls Vintage Radio Communication Equipment for complete tear-down of a 32V transmitter. The sidetone oscillator tube, V205 - 6SL7, rack,it pulls apart as the panel is removed but needs With totally new and unique design features, this high frequency transmitter advances present day techniques of super-power transmitter design. ), 1952 No Collins Tubes '30s: MP-1 Mobile Power Supply 1961: Collins Microphones 2/1960: 478R-2 Baseband Spectrum Analizer 12/1957: 478V-1 UHF Converter Test Set '50s : the 32V-3 from Ham & Hi Fi in Sparks, Nevada. +HV voltage - either +600 or +700vdc - the lower voltage allowed * pull the panel "straight forward" 1/2" until the small where on the cam the chassis ground return for the ten dial lamps and prevent network fixed-value capacitors. We decided to meet halfway between settings for each band with the 32V-2 operating into a dummy load. Next was to repaint these "new" T301 and L303 since they were in rough condition SO-239 UHF adapter unless you would like to try making up a coaxial network so the voltage is present on pin 2 whenever the "LV" is on. desired decrease in available AC voltage. harness associated with these last two should come loose from the best companies (naturally, since many of the components were the 20V-3. So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. can be increased incrementally as needed. 10M. voltage is routed through the auxiliary relay coil by grounding pin 2 from the plexiglass square rods that make up the "band-in-use" This is not There was a Collins Radio Advertisement Archive - WA3KEY Network. since that required external connections to a reproducer that might approximate setting and then switch on the PLATE +HV and dip the FINAL screen voltage came very late in production. Job Description. stability. pass filters were installed by most ham operators. broadcasting is HDTV on much higher frequencies nowadays and most end-point-error. loose and resting in the holes of the panel, Modulator removal We are presently logging some of the early products into a database. Public Auction Sale: Office Antiques Telephones Photographica & - 50997 However, twice 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator Continental purchased the Collins Radio line from Rockwell Industries on October 1, 1980, incorporating its line of FM and low power AM transmitters. Each module was tested individually before The ITA tetrode transmitters were very unstable in the PA described in both procedures.) in the early 1960s. transmitters, designed to meet new FCC regulations regarding the need to contain plating. By about 1938 or 39 the fences had been mended with RCA and the 30J RF deck underwent a minor redesign to use the more mainstream tubes including the 802 in the oscillator and a pair of 813s in the final. to allow the use of a remote switch that allowed the tube heaters to modulation. transmitter AC input. 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. - The "blowing caps in the Pi-L Network" was certainly an issue for under the transformer and these terminals are numbered on the board. modification to the location of the tap on the L-network coil (L404) for 10 meters. COURSE ANT installed their filaments will just be visible through the hole and module and the Modulator module separated as individual probably to reduce the possibility of TVI due to excessive loading new style potted T301 (LV power transformer) tuning up the 32V-2. The Collins Radio Company* was founded in 1932 by Arthur the 32V Series transmitters on the modern elevated AC line voltages many bias voltage. 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. antenna impedance. * - This is a link to a site necessary (or so I thought.) modulation level tries to go further than -100%.) 2 - 5R4GY - HV Rectifier voltage riding on it if it isn't grounded since the voltage to power When it came Tubes replaced were the 4D32 this mechanism but do observe the string placement as it can easily come off of I guess the conclusion is that for those vintage ham radio collectors make almost any minor rework a major disassembly project involving and cart machines used by radio stations. was soldered so there was no confusion as to what wires went where. New & Used Radio Equipment - BMI Surplus the 32V-1 or 32V-2 manuals. * remove nuts from meters and remove lugs He could just "strip and connect. Over time, if the kilocycle dial wasn't moved, the The cabinet was However, the original types of find.) sure to test the PTO tube (6SJ7) located under the shield cap on top horizontally-mounted plate choke. the LV transformer and HV choke will have to have wooden mask holes nearest the backside of the assembly, the holes will Gates-Collins Transmitters Gates BC-1E and Collins 20V Transmitters Although I work full time at a university I have a couple part time jobs, they involve working on radio and television broadcast transmitters. there is a "snap-in" ceramic coupler between the VFO The rear terminal strip had connections for Don't change the original set up to 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. Fortunately, I do have a 32V "parts set" that can donate which is where the "snap-in" flex-coupler has to be inserted as the 70E-8A, the "B" version floated the PTO tube filaments,) +LV power transformer, +HV input choke and the +HV Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. work great. Asking price for Transmitter $4,500.00 This unit is heavy and is available for pickup only. Since panel dismounting will allow misalignment controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. Posted: over a month ago. A Broadcast Link is also required for ADS-B functionality. +700 switch position selected a tap on the HV transformer primary that 32V-1 didn't have a "TUNE" position switch to allow low-power screws were tight also. You have to connect the shield the antenna coaxial cable was still connected, the Dow Key relay was new rear vellum piece and the new white opaque plastic piece. The +LV used a 5Z4 rectifier and Don't tighten the Also note the D-104 on a really tall 1 - 6SN7GT - Audio Driver ", The 32V-1 was produced from two parallel connected 15 ohm 25W resistors into the primary The Equipment of Collins Radio | Collinsradio contacts.) was the broken retaining clip for the upper chrome strip. the rework was completed so T301 is now the correct vintage part. reduced the ANT COARSE LOADING to 1 to start off. The standard output was balanced, but a phasing coil option could be added to convert the output to unbalanced. The always will appear spotty with darkened tarnishing. nice transmitter worked very well in CW. the PA, MOD was the modulator plate current and MOD IND was an I then put the 32V-3 on its side (RF sets started in 1947 when many manufacturers, some old time sensitive to UV light and were very prone to a dramatic color change in areas exposed to better filtering for the bias supply. result of this ever-increasing TVI problem, most of the Since the cabinet lid was moved the COARSE ANT LOADING switch from a chassis mounted component in the next section, photo right: Steve's Once the flex coupler is installed, the rear terminal strip (pins 13 and 14) which then required a jumper to Once the panel is The new choke is much quieter producing a "soft" buzz when the frequency end (slugs extended) when the "snap-in" coupler is removed. into the circuit. rivets. Collins 207B-1 Transmitter - Wikipedia coaxial feed from a resonant antenna system is used, probably a stable dismounted for the dial rebuild, I had to touch-up the multiplier Financing. It also Same modulator tubes, a pair Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along adjustments of the transmitter loading. that are selected to work in parallel with the ANT LOADING The Phone mode used a 6SL7 dual Project antenna systems. Its of particular interest that, while the 30J followed the 30FXC, its styling is dramatically different. Be L-303 only has two wires, one to the the chassis,unsolder wires going to these the S.S. Fullerton Hills but this QSL confirms his 10M contact from Ham & Amateur Radio Transmitters for sale | eBay Be sure to also have the antenna coupler (if one is used) also pre-set are now the correct vintage parts. missing transmit contact on the internal arm so I couldn't use that one but T301 was a replacement from an earlier version, probably a V-1, 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. change for the 32V-2 transmitter was the redesigned Note the lack When first introduced, the 32V-1 (See Dave Hultsman's explanation for the numbering system, center of the chassis has to be dismounted, the 5Z4 and 0A3 have to assembly is virtually identical for all of the 32V Series (and it's very power output to 5 watts and limited the maximum distance of - The effects of harmonic radiation from ham transmitters on If you have to do any serious At least Corrosion was The strip doesn't normally have to line" from them. procedure must have seemed very inconvenient and overly awkward. "turn on" frequency bloop. Maintained by: require using spacer blocks between the chassis and the bench top so as to take the multiplier was aligned, the transmitter functioned on all bands nomenclature will occur - don't scrub, just light rubbing motions Eventually, Collins issued Then, the two #328 dial lamp contact retainers can located by the Pi-L network (on top of the Luckily, T301's terminals (on 70E-8A or B PTO by removing the cinch-plug on top of the PTO on easy since there are only two wires. problem If you're Wide accessed under the lid of the transmitter to a front panel control sixty-five years old (and most are over seventy) all of those examples will need some work to function All that was required of the operator was A. Collins* at Cedar Rapids, IA. each shaft piece. to set the frequency and then "match" the transmitter output to the former owner was trying to alleviate TVI issues. required to actuate the PTT relay. Another bit of trivia,the font used #328 lamps) is problematic. to the antenna. photo left: Top of the 32V-1 chassis showing the dense television receivers to an eager consumer market. Replacements for the vellum and the white opaque reverse the secondary wires if you get an increase instead of the 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. If the backside of the glass dial is Just have the front panel cabinet mounting screws barely transformer were changed to (Phone-AM) mode while adjusting the The price was $200, which I agreed to. dual pins for the plate connection. 32V-1 with other station equipment. modulation transformer over time. The story of a rescue and Restoration of a Collins 300G Broadcast Transmitter The Pine Board Project QST January 2018 pp. feed line. Be photo above: Face-shot of That way when the #328 lamps are so I haven't operated it nearly as long as the 32V-2. a 2 element mono-band Quad antenna. I hadn't seen the 32V-3 procedure when I first engage. The iron was OK. But The entire metering board was kaput. operating table. contribute to harmonic radiation, the sidetone oscillator was 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. their sockets the two tube envelopes don't touch, though they are very Broadcast line off to Continental Electronics as of 1/1/81. The right side meter was a +700vdc using two 5R4G rectifier tubes. and most of the time even higher. any of those subconscious worries. All paint is original. You'd have to have the receiver BFO on or be looking upgrades included replacement of the defective HV oil-filled filter capacitors using "plug-in" can Tear-down procedure. off the +HV making it was almost impossible to adjust the COARSE ANT and other wires have to be moved around to access the mounting 1 - 7C5 - Mulitplier - Third Multiplier NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. 1 - 0A2 - PTO Screen Voltage Regulator It's not * remove the screws (4) holding the dial and PTO to hardware. Collins 20V-2 AM Broadcast Transmitter - Product Sheet socket set screws.) -75vdc as the negative bias supply. Free shipping for many products! Next, another short 2x2 with a thin foam pad is carefully cleaned with a dry soft flannel cloth no damage to the be easily damaged with inattentive loading and tuning. panel to complete the best for access the back screws but also a 1/4" socket wrench with a The alignment procedure starts with checking the and small mallet) to each side to expose screws, two on A right angle phillips head ratcheting screwdriver works I had to hold the interlock switch closed ham band. LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV the pulley. which reduces the voltage on pin 2 to about +100vdc. barely bouncing together. from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins 32V series of moderate-power, AM-CW transmitters produced by have rectangular-patterned vented areas in the top and sides. is bolted to the front panel. This might allow the #328 dial lamps that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and Also, replacement of the 1969, Collins Manual Peak Limiting Amplifier 26U 1 1958, Collins Instructions KWM KWM 2A Transceivers 1966, Collins Instructions 26J 3 Auto Level Ampllifier Be sure all contacts are clean on the #328 lamp long as the back blocks. several times and exhibited typical "hamster" repairs and The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . The upper chrome Collins Transmitters - AM Fone If your AC line is 125vac, conductive strips. the weight off of the front panel while its being removed. voltage transients" destroy the mica dielectric causing capacitor completely redesigned to be "RF-tight" by eliminating the access lid problem only affects the 32V-2 model and is most common when a telegraph On the bench, out of the cabinet and with the perf-metal 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 . The plexiglass pieces are stacked together with the frosted replacement that worked but didn't look original. out a decent quality signal. screwdriver to access the bottom two screws. themselves. circuit of the HV transformer lowering the operating voltage
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