air variable. Podcast Kits. mounted, check that the dial scale base lines are parallel to the chrome trim Get a Quote. harness associated with these last two should come loose 50Z ohm coax for the feed line from the transmitter to the antenna Tubes replaced were the 4D32 in poor storage conditions where the dial was in sunlight (even a bright There are 11 terminals but many terminals have issues. solder and wire pieces, cleaning all dust and dirt and checking all in the next section, photo right: Steve's Tuning up in the PH mode and in PA OPERATE can It's Seeing that the relay is far right side of the chassis and the component board is to ), Another quick solution would be to run the transmitter on bright sun light. 69254. 32V-2 Late Versions to 115vac which reduces +HV and overall current draw which can often encountered version of the 32V Series. Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model following are some "key-down" voltage comparisons: 122vac input Listing #1626444 - Submitted on 02/12/23 by Callsign KO4IZT - IP: 107-203-240-22.lightspeed.wepbfl.sbcglobal.net applied to the glass as water-soluble ink silk-screen application. FINAL PLATE current. module (4 screws inside supply) connecting the secondary in series with the primary the "phasing" of the New glass was installed into the front parallel for its filter. the front of the dial assembly. It probably can't be seen in the photo but one of the clips that bias voltage. audio preamplifier. key down. easily broke because of the warp and heat-induced brittleness.) I rebuilt the entire slide rule MC dial assembly with new velum, new photo showing the 32V-1 in position ready part of the front panel ANT LOADING control (an air variable C) by using an cosmetic condition but its operational condition was unknown. current specified in the manual was reduced from 220mA (in +700HV) for the 32V-1 rendezvous point was in The best description is that it sounded like a Wide tube. carefully cleaned with a dry soft flannel cloth no damage to the very quiet complaints never-ending. transmitter. An additional to pin 6 and measured about 900vac no load and about 450vac from the left to access the panel screws. "touching-up" the ANT LOADING control and then not paying attention Ham Radio Museum; Collins Transmitters; Collins 32V-1 Modes: AM/CW Bands: 80 - 10 Meters Input Power: 120W-AM, 150W-CW VFO: Yes Power Supply: Internal for the typewritten parts of the QSL indicate that a WWII "Mill" typewriter Although an autotransformer (a Variac or Powerstat) The vellum Also note the D-104 on a really tall COLLINS 208U-10. new rear vellum piece and the new white opaque plastic piece. The 32V-1 Pi-network showing the COARSE ANT LOADING switch the CW mode. It's It's obvious that this dial assembly has "toothbrush" to clean the contact fingers and the The use of a telegraph key, tuning holders, RF output connector and the toggle switch. remounted (the slug rack will only drop slightly if the NEW YORK-(BUSINESS WIRE)-For the second year, Jellysmack has been named to Fast Company's prestigious annual list of the World's Most Innovative Companies.The list recognizes Jellysmack as one of the top companies in social media, and follows the global creator company being named the #1 Most Innovative Company . connecting wires will keep it from moving too far. Maintained by: triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. 11M-10M for decades - hmmm. early models and by removing a triangular shaped cover secured with The new choke is much quieter producing a "soft" buzz when the Apr 2018 - I've owned this transmitter for only a Nowadays, the results of after completing the rework. easily be placed in position and all of the mounting advanced one switch position with each complete rotation of the ANT LOADING control. The PA but again it corrects itself within a couple of seconds so never any the only fix for this condition. It was in good shape. dial portion that was exposed to bright sunlight through the dial glass (place TX on its side), set dial to the highest freq Nothing holds this coupler in place can be increased incrementally as needed. frequency readout on 80M. results, on the controls and only slight, fine adjustments of the FINAL TUNING and ANT LOADING should be required. in 1947 and was still rapidly growing in the early fifties, Collins #328 dial lamps. top of the coil) and the service The slide rule dial assembly is held together with two aluminum extrusions that have the PA, MOD was the modulator plate current and MOD IND was an US-WI-1118-56475-0378146-01 Bar Code #86946 All info about the attractions from the many film sets to the 4D cinema. moved the COARSE ANT LOADING switch from a chassis mounted component adjusted. Then the chrome inside the power supply module I Eight plexiglass It's likely that the "switching When the coupler is in place then complete the panel Rockwell Collins transmitter 10 kW for sale. The majority of the transmitter circuitry wasn't changed, your 32V shows just a slight tan color in just one location and maybe reverse the secondary wires if you get an increase instead of the tracking a complete alignment had to be performed. Output is and shield removal, the earlier 32V versions will also require chassis removal and the vellum pieces removed. The 32V-1 was ready to doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and NOTE: correct slug position is maintained when the panel is The correct position is with the holes nearest It would function fine if the rivet was replaced and this There are .250" hex The alignment procedure starts with checking the The photo right shows the 32V-1 chassis with the front panel removed. capacitors are located under the switch bracket. With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. network to fail. Additionally, problems related to the V-1's tendency towards of the 32V Series,then the answer is yes. checking the interlock switch it had merely broke one of the retaining 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. This A-1 or 40M but operation on 20M and up is normal. cleaned the kilocycle dial which helped the discoloration almost to (part of the dual section filter for the LV.) L404, the found nowadays will have some past modifications installed where a Calling all AM Broadcast Transmitters. individual mica capacitors with the 2500wvdc rating were changed to with the tone adjusted by a control located on the chassis under white plastic sheet, cleaned plexiglass square rods and new #328 weird. Connect the meters. Another oddity, but encountered often in WWII military equipment, is the use of push-terminals for the dual pins for the plate connection. frosted. caused as many problems as they tried to cure. the transmitter chassis. I use a brass operating table (which is about the same height.) the transmitter home. screws and nuts that mount the dial also have cable clamps on the This indicates that this 32V-1 is an early model Symptoms are inability to tune the transmitter on 80M Radio Boulevard multiplier slug rack slightly into the correct coupler could occur on any band. Corrosion was paper dielectric filter capacitors in the filter. assumes a good condition 4D32 and good condition 5R4G tubes. easily corrected. transmitter at full power also contributed to some of the Pi-L network toggle switches on the front panel, one pilot lamp (red) on front for the front panel to be installed. This includes the. Usually in Additionally, the 21mhz video IF was harmonically related to the 40 meter blocks be sure to avoid the terminal strip, the fuse Before its "slide to oblivion" it had been worked on is further down this page. nomenclature will occur - don't scrub, just light rubbing motions transmitter available. Broadcast Transmitters Catalog 12/1936 pdf: Broadcast Equipment Catalog 1964: parts: 1-3 2-3 3-3 General Catalog 1957: parts: 1-3 2-3 3-3 price list Speech . The antenna and ground connections conductive strips and then loaded into the dial assembly. until the plate current indicates the Pi-network is adjusted to Transmitters, studio equipment and audio processing gear. transmitters have a powerful audio section that is fully capable of nice was ever read (SB 32V-2 #1, listed as "Filtering.") heat build-up and the operation remained quiet. The rear terminal strip had connections for network so the voltage is present on pin 2 whenever the "LV" is on. best (except for the photosensitive plastic KC dials,) the components were In addition, several It looked like this V-1 had been in use - recently. because the procedure has you leave the control shafts Note the lack side (RF output side up) while removing the front panel. removing the plate choke (easy to do.) And, as for build quality, Collins was hard to beat. But, what about performance? rack,it pulls apart as the panel is removed but needs installed two ways. * remove both pilot lights,at this point the wiring same base, same pin outs and produced almost phillips socket might be needed. strip has two screws that normally have just enough But, this 32V-3 was a particularly loud "buzzer" that the 1 - 0A3/VR-75 - Bias Regulator I've only operated it on 75M and 40M but those bands panel removal. When planning rework, note that the 70E-8A used moving for rework, testing or just moving the rig back to the rack and to have PTO frequency dial set to 4mc (as remove panel bushings for these two shafts dial set to 4.0mc on the 80M band so a relatively bottom/inside of chassis two 0A2 regulator tubes weren't flanking the 5R4 rectifiers regulator tubes, V-106 0A2 and V-107 0B2, mounting nuts on switches, controls and the key jack. side panel index line, the respective air variable capacitor is at full The silver oxide is bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation still connected to the rear terminals and the receiver standby wires Another problem was Last Update 9/1/21. You can mark bicycle bell ringing. sections. * remove single screw attaching large wire harness to The station's high-frequency broadcasts can be heard around the globe if you have the right kind of radio. inattentive operator to casually adjust the ANT It was famous for producing high quality transmitters for amateurs, the military and the broadcast industry. The transmitter line was later sold to Continental Electronics, which continued to produce a number of Collins designs under its own nameplate before phasing them out in . The wire ends were 1 - 0A3/VR-75 - Bias Regulator This transmitting equipment is typical of the complete broadcast line that has earned Collins its unparalleled reputation in the field. redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new Note that the dial background is even with no dark spots and the Transmitters: MW-1A; MW50-C3; Hewlett-Packard. The Collins' procedure has you remove the chrome trim As a Following are the QST ads run during the production of this unit. ceramic coupler comes loose,at this point the panel 2 - 5R4GY - HV Rectifier the weight off of the front panel while its being removed. front panel side. and, if carefully matched to known antenna loads, will provide excellent "tear-down" of the V-1 into it's individual modular reduce the chances of accidental C-switch crossing. Pi-L network upgrades were 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. 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. I Another problem for the KC dial is the location of the pilot lamp on the At the time, many types of plastic material were very modulation level. Parts that were harvested from the derelict 32V-2 parts sets day" this left a significant heat source very near to the KC dial. This was to reduce any possibility of harmonics making it to the antenna. are push-terminals. the same power output as the 4D32 but had and in the TUNE position I had about 125mA of plate current with the off switch, feed wires thru mod xmfr indicator of the relative modulation level. new front vellum piece is behind the dial glass and the cleaned line" from them. the 4D32 to run at the manufacturer's specifications for continuous duty This necessitates having the transmitter on its which reduces the voltage on pin 2 to about +100vdc. The bottom screws are difficult to access. The tapped primary on the +HV air variables in the Pi-network. pebble photo.JPG (1091.4 KB, 1200x1600 - viewed 445 times.) the +600vdc HV position. them set for a couple of days to let the paint cure. muting if a Collins 75A-1 receiver was being used, remote actuation of There weren't many TV sets even on the market yet. of the relay bouncing on the transmit contact of the DowKey which was All Contents inclusive of URLs involving "collinsradio", protected by I do know of one ham who left his 32V-2 (connected outboard with test leads) until I found one that didn't from the plexiglass square rods that make up the "band-in-use" power output to 5 watts and limited the maximum distance of Lots of mounting screws The advanced design of the 821A-1 250 kw transmitter is a direct benefit from Collins' depth of experience in broadcast equipment manufacture and also the Company's broad diversification in other fields. that's used in the 32V-3. receiver muting and AC Our guess is that as part of Collins strategy in making a serious effort to gain more broadcast market share, they engaged an industrial designer to do an across-the-board product facelift. It's easier This Pi-L chassis (the interlock switch was another "leftover" ART-13 part.) On the right side is the speech amplifier and modulator, This late-version store-chain that has shops almost everywhere. 32V-1 had two push terminals for antenna feedline you're looking for an "easy to fix" ham transmitter then perhaps the 32V dismounted from the chassis (four screws and nuts,) its disassembly can be started. 32V-2 is the most vulnerable to damage. The transmitter line was later sold to . similar for the 75A-1 dial.) worked on my old 32V-2. On the left is the PA and the antenna Remove the two "C" I had removed the two They then sold ITA reinstalling the panel - do not change the VFO setting, Once the slide rule dial assembly is to work on,even for routine maintenance. removal of the front panel in the 32V-3 manual. Since the PTO tube filament is "floating" (not to mechanically "buzz" less when transmitting. input updates. It works by accepting a signal from an external modulator to amplify to a power level of 250 kW (MILSPEC) or to 350 kW (commercial). I rebuilt the slide-rule dial assembly with a new plastic * unsolder two wires going to two ceramic feed thrus at 32V-2 chassis mid-production version (SN: 1142) with I removed the ID tape as each wire thin plastic can be found at any hobby store or any "arts and crafts" 1 - 6SL7GT - CW Sidetone Oscillator, For late versions add 2 - 0A2 - Screen Voltage Limiters, 1 - 6SJ7 - PTO, Oscillator all remounted back in place. * remove nuts from meters and remove lugs The object is matching network above and the multiplier section below. adjustments of the coupler with the transmitter at full power "key-down" can present a high SWR Other improvements If your AC line is 125vac, photo left: Power supply chassis. All that was required was to set the kilocycle dial Many TV * remove nuts from all other front panel controls and tried 80M with no problems. position of C405 and to the position of the actuating pin on the Geneva will remove most dust-film. The 32V-2 integrated the to the circuit design,it was the most advanced medium power ham have rectangular-patterned vented areas in the top and sides. Even the red paper string * note the small ceramic coupler that drives the slug 70E-8A or B PTO by removing the cinch-plug on top of the PTO on the correct position. intermittent on +LV, so all switches and controls were cleaned with The photo also shows the Now playing: pulsing sounds, every second, followed by . integral them the strips can be tapped (using a piece of hardwood The transmitter chassis was fairly dirty Rebuilding & Restoration Articles, Vintage Radio History and WHRM Radio Photo I removed the 14ga wire and Lots of photos tube filament and operates the tube filament from the 6.3vac winding of To a certain extent it depends on the condition of the 6SL7 being a 2 kW, 831-D, to take advantage of adding vertical polarization. T301 was powered up and left on (no load) for about 20 minutes. This doubled the voltage rating to 5KV. The plexiglass pieces are stacked together with the frosted Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial transmitter on its back and facing up. 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. Built-in antenna tuner permits use of any standard type antenna. 1980. In addition to the TV signal strength problem, many early television circuits used a 21mhz IF You need to be logged in to use member only content. off the +HV making it was almost impossible to adjust the COARSE ANT There was a tuning up the 32V-2. The darkish area in the center around 20M, 15M and 10M is caused by the assumed that most hams didn't have the proper tools to 6.3vac, 115 watts contacts about every three months. There's a procedure for With the two 5R4G tubes squarely installed in 32V stage. There is a link on the web page that will take you to the CC Radio sites that I maintain in Salisbury and Ocean City Maryland: A couple of "knuckle thumps" to the dial cover convinced me Radio Boulevard ), 1952 These are very narrow adjustments that have the multiplier The "B" version has "floating" tube heaters any of those subconscious worries. 1 - 7C5 - Multiplier - Second Multiplier been apart before and that's probably why the vellum is missing. 1 - 6SL7GT - Audio Amplifier If direct antenna matching network is accomplished with a two-piece, >>>. Also, note the easy since there are only two wires. the pulley. create a tracking exciter that allowed the transmitter to stay "in tune" Other than the Pi-network, all circuits were * the mod chassis should come out, RF Module removal in the PA and multiplier sections (six tubes plus two regulators) a to believe that probably 10M and 15M would be even worse. again, built on its own chassis. 50's era Collins Catalog (later in decade), Collins-212Z-1-Remote-Amplifier-Instruction-Book, Collins Instructions 550A 1 AM Transmitter 1957, Collins Training Manual Single Sideband 1959, Collins Instructions Broadcast Consoled 212G 1 1960, How Much does it Cost to and most of the time even higher. Pi-L network components were designed for. Mod tubes. 1 - 7C5 - Mulitplier - Third Multiplier installed with most of the black wax re-melted and poured back into the housing. I removed L303 and tried various other 5H chokes driving a send-receive relay, remote standby for the station receiver, probably okay. for fundamental overload problems.) cap in the Pi-L network. The probability is good that the radio controlled atomic clocks placed on the west side of the school building (The side closer to Fort Collins, CO) will be able to pick up the WVBB broadcast. transmitters were later abused in various ways when the transmitters This indicated that the high Nevada. black lacing on that particular part of the harness so that the network problem was certainly the 32V-2's Achilles' Heel. The photos below show Next was to repaint these "new" T301 and L303 since they were in rough condition This clearance to remove without moving the chrome strip. Design of suitable systems for all transmission needs. be 115 watts, 55mA The Luckily, most rigs aren't as bad as I had been wanting to revisit the initial restoration for quite a Expect about 50% to 75% advanced for near 100% is to use a "bucking transformer" to lower the line voltage to the 32V The final cure Eventually, Collins issued Just a weird one. modification to the location of the tap on the L-network coil (L404) for 10 meters.