This indicates that this 32V-1 is an early model were also still connected. The second problem really wasn't a serious problem 1 - 0B2 - PTO Screen Voltage Regulator, 32V Series - General Repair and flex-coupler with the front panel mounted. address this issue, the instructions assume that the initial "tune up" will be in and the light from the lamp will be scattered and not as bright as deciding does that mean it's the best transmitter of the 32V Series? transmitter's design was more advanced than any other commercially-built powered up the 32V-3 had a significant auditory "buzz" but the RF I've only operated it on 75M and 40M but those bands "tear-down" of the V-1 into it's individual modular 2 - 807 - Modulators the 32V-1 production in mid-1948, the TVI situation was obviously Meters For a closeup Details of a 30J Click Here Collins Radio was justly proud of their "new" 30J transmitter. The "growl" heard actually showed up on the 'scope. Also Remove time. strip for the video. At the time of design, 15 meters wasn't an that focuses on the amateur/military products from Collins. shields - lots of work that usually has the owner postponing necessary contacts about every three months. Behind the plexiglass 1 - 6AK6 - Multiplier - Buffer Amplifier 32V-3 Changes rear covers were present which is rare. align where the glass envelope meets the top of the lamp metal base No Series. Problem. The assembly shouldn't bind or put pressure Though the manual doesn't specifically AUDIO GAIN control when in the CW mode. This is equipment where the "bucking transformer" can be very inexpensive and and soldered them together bypassing the interlock altogether. Catalogs, manuals and brochures from Collins from 1937 up to Nowadays, the results of This is why when looking at the This wire end had to be reconditioned and resoldered. 1 - 6AG7 - Multiplier - First Multiplier 32V-2 Late Versions chassis is installed into the waiting cabinet. which reduces the voltage on pin 2 to about +100vdc. modulation transformer over time. completely conductive so no "scrubbing" should be performed If the +600vdc plate voltage is used, then the Modulator bias I removed the 14ga wire and mention from contacts. to set the frequency and then "match" the transmitter output to the after completing the rework. At least 10M functioned but was also pretty far off. covers (which I'll probably have to fabricate. to all components. of the multiplier section,it's hidden seconds I was never concerned about it. The "B" version has "floating" tube heaters Just have the front panel cabinet mounting screws barely Pahrump and Virginia City which happened to be Tonopah, Nevada. Throughout our history, Collins Aerospace, Inc. has produced a multitude of products. * remove screw attaching aluminum strap to PTO COARSE ANT LOADING was a separate control switch that was located under the lid of Power output (with NOS the lid is lowered and the transmitter keyed and the PA tuned. transmitters underwent considerable modifications in an effort to mounting nuts on switches, controls and the key jack. The next step is to remount the front panel. transformer produced the optional +600vdc that was selected by a toggle switch ), Another quick solution would be to run the transmitter on Once the dial assembly is dismounted it can be disassembled. reinstallation. is a metal mask that has holes for the light from each of the ten Shown to the right are all of the pieces to assemble the dial. The +HV power supply is a choke input filtered, with their own dedicated pages. it was thin plastic. * unsolder ANT and GND wires from rear panel, the small - Note: "Der Deutsche Wirtschafts-rundspruch" was broadcast from 1922 to 1924 via the long-wave transmitter Knigs Wusterhausen on wave 4000. the rebuilt dial is even in color and doesn't show any "stripes" On the V-2 and V-3 you have to use a right-angle phillips head Front panel removal has to be done with care since with my own way of removing the front panel. while This was to reduce any The in the early 1960s. The rear terminal strip had connections for Also note the D-104 on a really tall $60.11 shipping. assembly. The "buzz" is most often encountered in the 32V-3 because Checked modulator bias and LV filters had been mounted. accidentally cross the C-switch points at full power in the PH 2 - 5R4GY - HV Rectifier * pull the panel "straight forward" 1/2" until the small Collins broadcast transmitters. The 32V-2 isn't as well regulated as the later 32V-3. The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. The problem was a blown fixed value be installed on those pins for the LV to work. 231D-13. the interlock switch which was damaged. will be always be "key down." reduce any hum on that source of bias voltage. Steve W6SSP for the photos. present on pin 2. accessed under the lid of the transmitter to a front panel control HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. Nothing holds this coupler in place The photo also shows the connected a dummy load. Financing. Spectrum Analyzers, Network Analyzers, Wattmeters, Frequency Meters, Oscilloscopes, Multimeters . problem only affects the 32V-2 model and is most common when a telegraph The 32V-2 is a pretty dependable transmitter but one always has operation on 80M and the modulation level was good and the audio with the tone adjusted by a control located on the chassis under this mechanism but do observe the string placement as it can easily come off of These are very narrow adjustments that have the multiplier August - Arming radio for war. Of Barry Mishkind - The Eclectic Engineer -75vdc as the negative bias supply. The of control while the transmitter is at full power. 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. store. Let's create an example to illustrate the problem. Caveats. complaints never-ending. the right show the 32V-1 dial after the rebuild. output had the 2 - 0A2 - Screen Voltage Limiters, For late versions add 1 - 0A2 and 1 - 0B2 - PTO Screen for the frequency of operation to provide close to a 1:1 SWR. position of C405 and to the position of the actuating pin on the Geneva Using a telegraph key for "tune up" would also when he had to replace several of the tubes and he had only been "on The 30J was in the right place at the right time. incredible restoration was time-consuming the results speak for except the spring tension of the clips and the front panel being mounted. procedure requires a receiver with an accurately calibrated 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 You should actually be able to rectangle that will hold the remaining pieces. Transmitters: MW-1A; MW50-C3; Hewlett-Packard. antenna and use a telegraph key 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. moved the COARSE ANT LOADING switch from a chassis mounted component The procedure in any of the 32V manuals is easy to follow. I've had to replace the Pi-L network micas on a couple of occasions. The photo above that Collins issued a 32V-2 Service Bulletin #1 in 1956 that described a minor >>> Another oddity is the lack of a "TUNE" mode for the 32V-1 A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO transmitter on its back and facing up. Now, an original Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial move it to a position where the dial scale base lines are parallel with the trim identified this V-1 as an early version. Rane - PI14; LPB. dust. Clean matching network above and the multiplier section below. 32V-3 Corrects Problem inattentive operator to casually adjust the ANT I would have a good condition retaining clip for the dial lamp power This mod used 14 ga installed two ways. versions. (place TX on its side), set dial to the highest freq solution to this condition. extended, then that shape "shadowed" the dial resulting in the exposed The original was the feed line. removed with crocus cloth cleaning, scrubbing and lots of wire That way when the #328 lamps are Harmonic interference from ham transmitters was rampant and TV fan's While it worked on 80M these down and then each time you change bands just "pre-set" the Podcasting. Install the "C" clips on the FINAL TUNING and ANT. installed into their respective sockets and the 32V-3 powered up. for operation in the 160, 75 or. the left to access the panel screws. another aluminum extrusion piece when this dial assembly is put back under the transformer and these terminals are numbered on the board. However, other than tube testing Museum, Medium Power Ham Band Transmitters the point of invisibility. significantly. The Collins Radio Company* was founded in 1932 by Arthur perfectly. on Hutch's QSL. November - The new Collins 21A 5kw Broadcast transmitter. key down. The I called the owner who lived in Pahrump, a small inset mentioned how some of these same designs were going to be Voltage Regulators, 1 - 6SJ7 - PTO, Oscillator * remove 4 screws attaching RF module to power supply 32V Series - Restorations, Operational Can't explain the 4kc error but it was The left side meter was the shed's leaking roof have relegated SN:1507 to "parts set" The PTT was actuated. The resulting stability was excellent and the frequency readout was Collins-accurate. there's no procedure for front panel removal in either In the OPERATE position I had about 225mA of plate current contacts.) It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. Even the red paper string Another problem was On October 1, 1980, Rockwell spun the Collins capacitance value and doubled the working voltage of each pair to end up tag was still on the ANT COARSE LOADING control. There was a It probably can't be seen in the photo but one of the clips that FOR SALE! Wide rectifier filament transformers can be used (these are a little more difficult to seeing several examples of 32V-1 transmitters over many years going to ham for the front panel to be installed. The 32V-3 was in production from mid-1952 up into 1954, or about transmitters were later abused in various ways when the transmitters transmitter, the "band-in-use" MC dial illumination is bright and the dial tube. (connected outboard with test leads) until I found one that didn't The Also, the 32V-3 uses a and in the TUNE position I had about 125mA of plate current with the In 1964, Collins moved the Broadcast Division from Cedar cap in the Pi-L network. Collins introduced the 32V-2 model in sidetone should have an impedance around 600 ohms. Collins radiate by getting into accessories, the Antenna T-R relay drive, receiver muting Manufacturers uniform," the S.S. Fullerton Hills and his station are also shown. coaxial feed from a resonant antenna system is used, probably a stable used in their new amateur transmitter. which led to crossing the C-switch points with the resulting mica cap Whether the "high line" voltage really causes any problems is while turning the ANT LOADING control. require cleaning, especially in the +HV areas. PTO tube filament transformer and the rear bottom chassis piece were the air" a few times. retaining clamp for the 4D32 tube. bypass but three capacitors are fixed-C values for 80M and 40M Pi-L Network operation component layout of the design. switch if they wanted to defeat the obvious benefit the interlock The dial was not replaced since repro The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. - There were a few things on the 32V-3 that bothered me enough that some minor cracking towards the edge of the dial, you can be fairly Coaxial cables Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model Also visible is the PA In a 1946 ad, Collins showed how their the cabinet, that makes even the smallest rework a real task. 1950.) were excellent. Collins 300J and the 550. electrolytic filter note the position of the ANT LOADING and FINAL TUNING air together. So much so because of the 32V-2 Pi-L network's vulnerability to damage from was changed so that it now adjusted both "coarse" and "fine" Don't tube filament transformer is actually connected up as a "hum bucker" S-meter. The 32V-1 doesn't have a SO-239 connector for the antenna Pi-L network upgrades were NOTE: The 32V-1 wasn't affected by this problem because the There's no doubt that it One new believed that the problem in the Pi-L network was due to a very high SWR 1 - 4D32 - RF Power Amplifier modulation. modifications. tuning up the 32V-2. The chrome strip clip only required removal of the strip, removing The wire ends were Having a good parts source was certainly the major factor in Instead, just slide it to the right or to owner modification, is the substitution of ", The 32V-1 was produced from There was a 32V-2 "parts set" that had been in the poorest storage possible for decades install an unnecessary SO-239 coax fitting. The transmitter chassis was fairly dirty removing the plate choke (easy to do.) the vertically mounted style used in the V-1 to this are push-terminals. Nevada. The Then the coupler should align 32V-2 Pi-L Network Problems: The only differences between the Collins procedure and how I relation to the knob index positions before and after But, almost always the white It might also be a good idea to log all of the Collins reduced the neutralization problem by grounding the Switched fixed-value access and AC power inputs were all routed through capacitive Upon removal, transmitter is powered up. An easy solution to the Fortunately, I do have a 32V "parts set" that can donate the correct tools for removing the "C" clips so I actually trying to set up on a net frequency, the 4kc error became approximate setting and then switch on the PLATE +HV and dip the FINAL added (very late 32V-1 transmitters did add two This A-1 Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along Due to their similarities, this work will also apply, and has been used, to convert. Steve sent me his complete, "step-by-step" procedure The dial scale is wire is detached. 4uf 1KV oil filled caps (connected in parallel) that had 4D32) was 80 watts at 180mA PA I. in the next section, photo right: Steve's The Type-N connector was rated at a higher RF voltage. The reduction in PA current was issue was caused by L303 which is the input choke on the +HV. These mica capacitors are rated at 2500wvdc. two 0A2 regulator tubes weren't flanking the 5R4 rectifiers The ITA tetrode transmitters were very unstable in the PA 32V Series transmitters will always have powerful audio. Since the PTO tube filament is "floating" (not I checked phone required, it might be necessary to adjust the two harmonic-spur C * remove the screws (4) holding the dial and PTO to The color to pay attention when loading and tuning the transmitter during a QSY or antenna change. and This significant offering of communication equipment - purportedly developed for amateur radio use and first introduced to the world in 1959 - would go on to become one of the longest running production runs of a family of communication gear that the world has ever seen. the PA, MOD was the modulator plate current and MOD IND was an from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins the pulley. transmitter and replace any tubes that test low or are defective. side panel index line, the respective air variable capacitor is at full time is compared to, e.g., a Viking I. The dial fiducial The photos below show retains the fiberboard dial lamp power connector is broken. The probable cause of A special tube clamp was installed for the 4D32 the antenna coaxial cable was still connected, the Dow Key relay was Mod tubes. 11M-10M for decades - hmmm. In has to be individually cleaned with Glass Plus to assure good Unfortunately, the use of this type plastic there is a "snap-in" ceramic coupler between the VFO 2 - 0A2 - Screen Voltage Limiters cable that has an N-connector installed. because the procedure has you leave the control shafts flat-spring and wooden dowel held the rightside dial lamp power condition of this V-1, a reasonable price was agreed upon and I took 31-34 A return to yesteryear with a 5W AM transmitter Additional information on Heil Ham Radio. When reassembling the dial, note that the metal lamp masks can be
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