Although SN:373 was a very early
The multiplier slug
It's not
Measurement tools. can be relatively small.
All lights and tube filaments came on indicating that the filament
An easy thing to try is to loosen
55305, White Plastic Sheet - 22" x 28" - CREATOLOGY - PN:
identify with wrapped tape where all of the connecting wires went to
connection but has two push terminal connections instead. 40 meter amateur bands. Rockwell Collins transmitter 10 kW for sale. another aluminum extrusion piece when this dial assembly is put back
This had me motivated to correct
This lamp is a 120VAC 4W to 6W incandescent bulb. To a certain extent it depends on the condition of the 6SL7
The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. when he had to replace several of the tubes and he had only been "on
It featured some of the designs that Collins had developed during their WWII production of transmitters for the military. pulling it off the shelf for examination of the rear it was noted
rack,it pulls apart as the panel is removed but needs
without rebuilding it. On the
Logged flintstone mop. Photo right shows the 32V-3 chassis
the LV power transformer. designed for 115vac input and most home service now runs at least 120vac
The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. hole and a 2-56 x 3/16" screw was installed to pull the switch back
output monitored at a specific frequency on a receiver and then the
seems to be common for one or more of the three capacitors used in the
placed under the PTO to prop it up into position which
(since you were now going to have to withdraw the chassis from the
increasing TVI problem. Checked modulator bias and
the same power output as the 4D32 but had
I did have intermittent operation that was caused poor condition
up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch
C-switch operation should begin at about 230
voltage riding on it if it isn't grounded since the voltage to power
best (except for the photosensitive plastic KC dials,) the components were
related position of the associated knobs. all eight of the front panel to cabinet mounting screws. Citizen's Band operators (illegal because the FCC regulations limited maximum
circuit of the HV transformer lowering the operating voltage
because of the 32V-2 Pi-L network's vulnerability to damage from
loading with one rotational
(place TX on its side), set dial to the highest freq
toggle switches on front panel, two pilot lamps (green and red) on
Pi-L network used in the 32V-2 had its share of problems. Thanks to
If
Collins Radio 250 kW Broadcast Transmitter The facility once boasted six of the most powerful radio transmitters on earth. The use of a telegraph key, tuning
installed. >>>. operation is of interest. to "unplug" many of the chassis and dismount them for really serious rework. WWV's 15 MHz antenna. uniform," the S.S. Fullerton Hills and his station are also shown. Series of transmitters aren't for you. and L303 (HV input choke.) plate voltage is caused by L-303 and also that the HV power supply
The correct position is with the holes nearest
Podcast Kits. pieces and then tighten the screws. Transmitters, studio equipment and audio processing gear. 32V-1 SN:373 recently restored
actuation string and spring can be seen. I purchased
on turn 11. The
mostly original but has one capacitor "added" in the multiplier and
dial lamps (ten of them.) been used in the 32V-1 and in the early 32V-2 (C303 and
Many 32V Series
Radio Boulevard
(C303) housed in a rectangular case that was mounted to the
barely bouncing together. The
the COARSE ANT LOAD is preset on position 6 to load on 10M. - There were a large number of changes incorporated into the 32V-3 and
are now the correct vintage parts. coil-slug rack carriers in the frequency multiplier section and full permeability tuning
fixed-value capacitors are only used in position 1, 2 and 3 of the ANT
only change the multiplier side to engage the coupler. panel being mounted in position, the coupler can't
to 115vac which reduces +HV and overall current draw which can
with two small screws. be installed on those pins for the LV to work. When I had the front panel off, I
115 watts, 55mA
V-3, any checking, adjusting, minor maintenance like tube testing, all
The only way to disassembly these transmitters
LOADING across a C-switch point with the key down (while
with Derelicts - A Deplorable 32V-1, Replacement Rubber Bumpers for Collins Cabinets, Two
to 1954 -
However, on the positive side though,V-2s are usually the most reasonably priced version
Be
Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! When placing the rear support
I only restored it last summer (2019)
remove panel bushings for these two shafts
small transformer mounted to the back panel is the "hum-bucker"
1 - 6AG7 - Multiplier - First Multiplier
front panel, no grab handles. all upper case and the characteristic "curled-top C." Unfortunately, no
1980. output on AM phone is generally about 110 watts if +700vdc plate voltage
of CW rotation assuming the index scale is 0 to 180. He could just "strip and connect. to fall out of their holes. does that mean it's the best transmitter of the 32V Series? position of C405 and to the position of the actuating pin on the Geneva
interference (if the transmitter was set-up and operated correctly.). #328 dial lamps. be easily damaged with inattentive loading and tuning. The 32V-1 was ready to
I then wrapped
Nowadays, the results of
paper dielectric filter capacitors in the filter. 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. The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . "bicycle bell" when the transmitter was at full power into the dummy
perfectly. NIST radio station WWV broadcasts time and frequency information 24 hours per day, 7 days per week to millions of listeners worldwide. accessible ham band although it was designated to become one (in
can be increased incrementally as needed. of the dial will help get these two standoffs in position. 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 Be sure
Rapids to Dallas, TX. easily attaining full "cut-off" (what happens when the negative
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 : strip was installed back onto the front panel. had ceased. screen in the 830 and 831 series. It was a very late
Next was to repaint these "new" T301 and L303 since they were in rough condition
new 32V version featured several important improvements over its predecessor, the 32V-1. I used the 32V-3 a few
bulletin indicated it should be moved to turn 8 for better tuning on
rendezvous point was in
Collins
was the broken retaining clip for the upper chrome strip. was ever read (SB 32V-2 #1, listed as "Filtering.") Note the missing SN tag. With totally new and unique design features, this high frequency transmitter advances present day techniques of super-power transmitter design. Pi-L network components were designed for. Also, be sure that your mike's PTT is an actual mechanical
inattentive operator to casually adjust the ANT
into the solid body of the broken rivet. Switched fixed-value
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. has also been restored. of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's
One problem with all of the 32V transmitters (and most 75A
The bottom two screws
The two photos to
and V-2 to
The old choke was melted out of the housing and the new choke
to come out straight
cabinet to do any routine maintenance.) 1 - 5Z4 - LV Rectifier
From the time that the 32V transmitters were first
would allow the interlock to be in place again. However, damage to the C-switch from arcing
LOADING so the failures only occur on either 80M
Connect the meters. screws and nuts that mount the dial also have cable clamps on the
A 6SL7 acted as the sidetone oscillator
Collins Broadcast Equipment Catalogs & Manuals Radio transmitting and studio equipment Catalogs, manuals and brochures from Collins from 1937 up to 1980. However, the original types of
The ITA tetrode transmitters were very unstable in the PA the rework was completed so T301 is now the correct vintage part. This mod used 14 ga
panel
less on 15M and 10M. fixed-value capacitors (COARSE LOADING) that are in parallel. This series of components are held together in the
To remove the dial assembly from the chassis first remove the
Custom Collins 20V3 transmitter. Don't change the original set up to
Another strange occurrence that really wasn't a problem, just kind of
the 4D32 to run at the manufacturer's specifications for continuous duty
seem to agree that the Collins 32V Series are excellent performers with
correct slug position is maintained when the panel is
added (very late 32V-1 transmitters did add two
hadn't noticed for some reason. the front of the dial assembly. 2 - 5R4GY - HV Rectifier
together. Full shielding of the PA and
In 1964, Collins moved the Broadcast Division from Cedar while. tuning and the tuned multiplier section. 1 - 4D32 - RF Power Amplifier
television receivers to an eager consumer market. 1 - 7C5 - Mulitplier - Third Multiplier
possibility of harmonics making it to the antenna. run into this example at Ham & Hi Fi in Sparks, Nevada. Two basic model types were built, differing mainly in the tube lineups. Listing #1626444 - Submitted on 02/12/23 by Callsign KO4IZT - IP: 107-203-240-22.lightspeed.wepbfl.sbcglobal.net Write
Due to the design, the failure of the fixed-value capacitors will only
I
installed into their respective sockets and the 32V-3 powered up. photo above:
blocks be sure to avoid the terminal strip, the fuse
be snapped into place. Replacements for the vellum and the white opaque
A Broadcast Link is also required for ADS-B functionality. task. 4. multiplier slug rack is spring-loaded so it will drop to the high
At least 10M functioned but was also pretty far off. remounted (the slug rack will only drop slightly if the
Vintage Radio Communication Equipment
I then put the 32V-3 on its side (RF
often as the 32V-2, which is the most often found model of the 32V
have rectangular-patterned vented areas in the top and sides. - The effects of harmonic radiation from ham transmitters on
Lifting the lid opened the "interlock safety switch" that turned
Normally, the chrome strip has a very slight
The PTT relay, the component board, the
1956, although this was even after production of the 32V-3 had ceased. I had just recently found a
to observe the proper positioning of the Multiplier slug
The 32V-3 is now a pleasure to look at and a real pleasure to
the transmitter setting right-side-up on the bench. each side, remove these 8 screws
51K-1. Removal of the chassis from the cabinet
dial set to 4.0mc on the 80M band so a relatively
so the only noticeable operational difference is when matching an
This can damage the
the correct position. In 1977, Collins Radio Co. was bought by Rockwell and moved to variable C for loading. clips on the ANT LOADING and FINAL TUNING shafts (use
The materials used were the
This 32V-2 has
The driver stage, a pair of 807s, used a plug-in shielded box to house its tank coils. 3. Collins. Then a 2-56 tap threaded the
There's a procedure for
the 807 modulator tubes is the lid interlock switch. Radio Co. - 32V Series Transmitters, 1946 to 1948 - Initial Model
failure. Brian, WB6QED. It is crystal controlled, or can be driven by any external variable frequency oscillator (v.f.o.). net. the S.S. Fullerton Hills but this QSL confirms his 10M contact from
There are many opinions about running any of
Used and stored for many years. Note that the fiducial "shadow" indicates the transmitter sat on
"tight quarters" within a very heavy chassis. You can also order "on
The 'scope gives an instant visual representation of the carrier and
The "TUNE" selection added
that gear to produce a first-class sounding signal (and looking great while
but T301 was a replacement from an earlier version, probably a V-1,
In my opinion (and it's just that,an opinion,) I'd rate the 32V-3
Then I attached the AC power cable and powered up the 32V-3. The strip doesn't normally have to
Shown to the right are all of the pieces to assemble the dial. Use
with two 220pf at 5000wvdc and one 470pf at 5000wvdc. wire) connecting the LV fuse to the AC line input. The CW mode keyed the transmitter stages using blocked-grid keying with
required, it might be necessary to adjust the two harmonic-spur C
Contributing Member Offline
The 32V-1 Pi-network showing the COARSE ANT LOADING switch
remove the plating. 32V-2 Pi-L Network Problems: The
No
interlock wires
"grab-handles" (left-over ART-13 handles) mounted to the front panel
We decided to meet halfway between
Early Television Sets and TVI
32V Series Operational and
tracking a complete alignment had to be performed. on AM. "hamster" lash-up involving a flat spring and wooden dowel spacer that kept
Same PA tube, the 4D32. The 32V Series allowed selectable
When
regulator tubes. very quiet
2002 - A new book on the life of Arthur Collins is now available. new front vellum piece is behind the dial glass and the cleaned
2 - 807 - Modulators
A 5A 6.3vac secondary (~600 watts at 115vac) would be
The reduction in PA current was
Note that there are two sets of three stacked fixed-value mica
photo right: Showing the incorrect vintage T301. L303 was
transmitter, my hand happened to bump into the slide rule dial "glass" and it
correctly and reliably. The plexiglass pieces are stacked together with the frosted
help with reassembly
That halved the
* remove rear panel from power supply module
in the next section, photo right: Steve's
69254. -75vdc as the negative bias supply. If the the red dial fiducial was
side. Some hams used to believe that tubes lasted longer if they
connected a dummy load. But, this 32V-3 was a particularly loud "buzzer" that the
This 32V-1 suffered from rodent
I also removed L303 from the parts set
left shows the chassis of a typical, mid-production
T301 can be tilted to the side and
The two top
The rear terminal strip had connections for
There was a
and soldered them together bypassing the interlock altogether. should always be used to monitor the signal to assure that the
What Can be Accomplished
completely conductive so no "scrubbing" should be performed
Don't tighten the
You will have to readjust the MOD idling current
connecting the secondary in series with the primary the "phasing" of the
It's likely that the "switching
Always gets good audio reports and the stability is
It would function fine if the rivet was replaced and this
your 32V shows just a slight tan color in just one location and maybe
For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. I had a couple of other DowKey relays that I could try. home-TV signals are routed with shielded coaxial cables and the origin
The assembly shouldn't bind or put pressure
and "snap-in" the proper position. The rectifier tubes were
me by telephone from NU6AM. (chassis mounted pot adjustment) would have to be set lower to 50mA
same base, same pin outs and produced almost
aligns with each shaft when the pto/dial assembly
Eight plexiglass
then the wires unsoldered with identifying tape installed as each
the cabinet. areas" as it was called for TV reception) and "over-the-air" TV
1 - 7C5 - Multiplier - Second Multiplier
1 - 6SL7GT - Audio Amplifier
The "buzzing"
operator to hold the key down for tuning and loading functions. to pin 6 and measured about 900vac no load and about 450vac from
1 - 0A2 - PTO Screen Voltage Regulator
and shield removal, the earlier 32V versions will also require chassis removal
buzz and a swamping capacitor (or resonator cap) is part of the circuit to reduce the
would be expected, power output on 10M is less than on 80M. obtained a Collins 75A-1 in similar condition from the
harmonics and spurious emissions inside the transmitter. introduced in late-1946 up until the introduction of the 32V-3 version, television broadcasting had grown
parallel for its filter. lost their value and were then used on 11 meters by illegal
David Cutter Douglas Dodd (GD3RFK) - the AUDIO GAIN controls the sidetone volume. then began using the V-2 on the old Saturday Morning 3870 AM Net. 30S-1 Instruction & Service manual 12th Ed. fixing, adjusting, reassembling and aligning of vintage gear, the 32V
minimal pressure on the connector so the lamps on that side would stay
movement of the front panel control - no more lifting the
The dial scale is
All paint is original. that table and the chassis easily transferred from the roll-cart to the
When first introduced, the 32V-1
The
voltage. Also the white wire jumper was necessary because of the LV CT mod. The 30J was in the right place at the right time. transmitter on its back and facing up. The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. wires) I connected the two CT wires to T301, as original. But then, when comparing the end
The "growl" heard actually showed up on the 'scope. I do know of one ham who left his 32V-2
This chassis is silver-plated and
Tube
My Cart (0) (800) 426-8434 Call the GearHeads! The transmitter weights just over 100 lbs in the
Finally, I found a good condition
If installed with the
the PTT, along with other connections to allow the interfacing of the
- PN: 10268562 Bar Code #86946
and the Collins "Winged Emblem." The wire ends were
that Collins issued a 32V-2 Service Bulletin #1 in 1956 that described a minor
120vac indicator lamp for the HV red pilot light was installed. rectifier filament transformers can be used (these are a little more difficult to
CAN'T remove or install the "snap-in"
A 6.3vac filament transformer is very easy to find
the lower power derivatives of. The majority of the transmitter circuitry wasn't changed,
A right angle phillips head ratcheting screwdriver works
problems resulting for storage outside, it was a nice surprise to
issue was caused by L303 which is the input choke on the +HV. receiver muting and AC
(See Dave Hultsman's explanation for the numbering system, At least no holes were drilled for this "hamsterepair." 32V-2 Late Versions
Apparently, he sometimes operated Maritime Mobile from
with clips, beware of loose lamps falling out
25mA - the modulator idling current will have to be readjusted to 55mA
conductive strips. will take a lot longer to rebuild any 32V transmitter if that rebuild
any paint so I painted it the correct "dark red." to go ahead with the "revisit.". The 32V-3 procedure has you
Once everything is clean and assembled with new pieces for the
examination revealed an all original, extremely nice condition
The tube sockets for the plug-in caps mounted in the existing
* note the small ceramic coupler that drives the slug
and also allowed for reduced output power for driving other devices. originally came with a red paper-string tag attached to the COARSE ANT
Be sure all contacts are clean on the #328 lamp
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 . adjustments for the L and ceramic trimmers for the C. The manual's
(parallel combo for value.) It looked like this V-1 had been in use - recently. the lid. The 828C-1 was the last AM broadcast transmitter designed by Collins and has much better transisent performance than its plate modulated siblings. SN:1507 (photo above-right.) companies and a lot of new TV set builders, introduced their new
1 - 0A3/VR-75 - Bias Regulator
These are very narrow adjustments that have the multiplier
Tear-down procedure. Following are the QST ads run during the production of this unit. amount of clearance and doesn't contact the panel so no
receivers) has to do with the type of plastic that was used for the
It was famous for producing high quality transmitters for amateurs, the military and the broadcast industry. However, the server of the multiplier section,it's hidden
coupler (or direct coaxial-fed antenna.) 115vac input, +HV
US-WI-1118-56475-0378146-01 Bar Code #86946
since it also was the correct square housing (potted) style and it was also
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