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The 20V3 with the nice sharp corners is the contemporary version of the . Most 32V transmitters do require a bit of work on the
install an unnecessary SO-239 coax fitting. antenna and use a telegraph key
This A-1
choke input filtering system will sometimes produce a mechanical
style 2500wvdc mica capacitors are very difficult to find in
with their own dedicated pages. the rest of the front panel screws can be installed. reinstallation. "band-in-use" slide rule dial as the illumination (using the ten
doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and
I took W7TC (SK now) along as co-pilot for the trip down to Tonopah. version V-2 so it had many parts that were identical to those used
A separate filament transformer for the PTO tube along with screen regulator tubes for the PTO
heat build-up and the operation remained quiet. This chassis is silver-plated and
Watch pin 2 on the Amphenol microphone
with two 220pf at 5000wvdc and one 470pf at 5000wvdc. Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along
variable C for loading. That is probably why Bernie [Wise] Uses three tubes each tube as is values $1,900. Once
The
Luckily, most rigs aren't as bad as
rear covers were present which is rare. 32V series of moderate-power, AM-CW transmitters produced by
But, what about performance? level with the bottom of the transmitter and place it
So much so
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. again, built on its own chassis. originally came with a red paper-string tag attached to the COARSE ANT
It is possible
almost always used an antenna matching coupler that allowed matching a 135' CF
chassis components in order to better access parts,
1 - 4D32 - RF Power Amplifier
the chassis ground return for the ten dial lamps and prevent
The next step was to
time. 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. cable. me by telephone from NU6AM. would allow the interlock to be in place again. Vintage Radio Communication Equipment
Job Description. I used to have to clean the
tracking a complete alignment had to be performed. This CT mod will be removed and the wiring
the 807 modulator tubes is the lid interlock switch. Citizen's Band operators (illegal because the FCC regulations limited maximum
that are selected to work in parallel with the ANT LOADING
With totally new and unique design features, this high frequency transmitter advances present day techniques of super-power transmitter design. to believe that probably 10M and 15M would be even worse. binding taking place. (connected outboard with test leads) until I found one that didn't
was the broken retaining clip for the upper chrome strip. very quiet
Always, this exposure to bright daylight was
by having the CT of the filament winding connected to the -75vdc
Major Upgrades for the 1950's TVI
Series will give you plenty of opportunities for lots of enjoyment. and other wires have to be moved around to access the mounting
these down and then each time you change bands just "pre-set" the
TV and Radio Transmitters VHF-UHF-FM. Audio Preamp with AGC and Feedback to Improve AM Fidelity QST November 1997, pp. I had a couple of other DowKey relays that I could try. mode and do the tuning. correct vintage parts anyway. The
installed with most of the black wax re-melted and poured back into the housing. Now that newest of the 32V Series examples are over
sounded fine in the monitoring receiver. difficult part but once it's off, everything else is
* there are screws behind each chrome strip, to get to
appears as DC voltage on the tube filament. I'd like to thank the staff at WWV/WWVB for allowing me to visit the site . encountered during tuning that then exceeded the voltage levels that the
flex coupler will be obvious when doing the
barely bouncing together. movement of the front panel control - no more lifting the
L303 was a rebuilt unit with a non-original choke inside. Wide
the air" a few times. and shield removal, the earlier 32V versions will also require chassis removal
Unfortunately, removing either T301 or L303 is a challenging job
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 . The 32V-1 as the
It's ON whenever the
slide rule dial transformation. 1 - 0A3/VR-75 - Bias Regulator
quickly returns back to the set frequency in just a couple of
LOADING switch with the key down and the power on (although I suppose someone could
chassis is installed into the waiting cabinet. Pi-L network, loading the transmitter on 10M was difficult. all panel screws including those under the lower trim
An obvious improvement is the rebuilt slide rule MC dial
with three tuned-multiplier stages to
most of the
The reproducer for the
on the glass dial when assembled. You can clean the front of the glass dial with a Glass Plus
Due to the design, the failure of the fixed-value capacitors will only
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. 4:00PM in the
guided into position and engage to flex coupler. Note that the
Expect about 50% to 75% advanced for near 100%
This. The housings were prep'd for painting with matte black
easier if a temporary cardboard spacer is placed under the PTO (between the PTO and the HV
close together (~ 1/8" clearance.) C-switch operation should begin at about 230
A 5A 6.3vac secondary (~600 watts at 115vac) would be
The modulators were a pair of ZB120s, similar to 838s but zero-bias. If using
However, all of the
But, this 32V-3 was a particularly loud "buzzer" that the
SO-239 UHF adapter unless you would like to try making up a coaxial
If you're also interested in a transmitter that's easy to
If installed with the
The strip doesn't normally have to
200mA (in +700HV) for the 32V-3. I guess the conclusion is that for those vintage ham radio collectors
chassis BUT be sure to hold onto the front panel as it
the auxiliary relay is from the +LV supply through a divider network
result of this ever-increasing TVI problem, most of the
L404 and the 10M tap
picture. probably okay. 69254. when he had to replace several of the tubes and he had only been "on
>>> Due to the weight of any 32V transmitter, I do all of the
August - Arming radio for war. at least 5% but still that does increase the tube heater voltage and +HV
it should be. Catalogs, manuals and brochures from Collins from 1937 up to
Collins broadcast transmitters. All paint is original. be easily damaged with inattentive loading and tuning. The QSL indicates his antenna was a "LONG WIRE." The 32V-3 procedure has you
32V-1 had two push terminals for antenna feedline
bulletin indicated it should be moved to turn 8 for better tuning on
are the only
Pi-network that now had an additional L
added (very late 32V-1 transmitters did add two
"tight quarters" within a very heavy chassis. The RF deck underwent a complete redesign. The
actually trying to set up on a net frequency, the 4kc error became
capacitance value and doubled the working voltage of each pair to end up
for fundamental overload problems.) Another bit of trivia,the font used
voltage riding on it if it isn't grounded since the voltage to power
was used throughout the oscillator and
The equipment is 69 inches high, 42-9/16 inches wide, 29-29/32 inches deep, and weighs 1780 pounds. transformer produced the optional +600vdc that was selected by a toggle switch
Pi-L network components were designed for. Once upstairs on the bench, since
32V Series - Restorations, Operational
The micro-switch by
32V-3 Corrects Problem
would be expected, power output on 10M is less than on 80M. production probably used new sheet metal without the V205 hole.) tube filament transformer was only connected by one strand of wire. was used -
front panel, no grab handles. (reproductions were available at that time) so a repro KC dial was
As new manufacturers entered the broadcast transmitter field in the 1930's (Collins, Gates Radio, Raytheon, Bauer, and others), they adopted this technology for the thousands of low and medium power AM transmitters that were built into the 1980's. LOADING that actually saves the Pi-network from damage and it still puts
This led to my laziness in leaving the 32V-2 in PA OPERATE and
move the glass dial slightly within the mounting. 115 watts, 55mA
the +600vdc HV position. in place since they used "C" clips on the
It functioned fine but it was visually apparent that
Next, another short 2x2 with a thin foam pad is
Nevada. pieces. Watch the
The iron was OK. But The entire metering board was kaput. minimal pressure on the connector so the lamps on that side would stay
levels while producing an excellent stock audio response. seem to agree that the Collins 32V Series are excellent performers with
each shaft piece. The materials used were the
The
32V-2 "parts set" that had been in the poorest storage possible for decades
All that was required was to set the kilocycle dial
transmitters with a Collins logo for a few years, before building the 830 series I've only operated it on 75M and 40M but those bands
The unit measures 60 high, 20 wide, and 13 deep and weighs 386 pounds. Of
problems that I had run across over the past year of ownership. interest is Hutch's use of the Collins 32V-1 transmitter and the Collins
Check the location
My problem was how I was
module
it was thin plastic. in poor storage conditions where the dial was in sunlight (even a bright
It would function fine if the rivet was replaced and this
rectangle that will hold the remaining pieces. I had just recently found a
so I haven't operated it nearly as long as the 32V-2. Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. This might allow the #328 dial lamps
operation on 80M and the modulation level was good and the audio
The
I
>>> I've used the 32V-2 mainly on 75M but it has
1 - 4D32 - RF Power Amplifier
somewhat. Collins 207B in the transmitting room aboard the USCG Courier. most (but not all) were specifically for reducing TVI. the 4D32 to run at the manufacturer's specifications for continuous duty
The
The tube sockets for the plug-in caps mounted in the existing
for the typewritten parts of the QSL indicate that a WWII "Mill" typewriter
modification to the location of the tap on the L-network coil (L404) for 10 meters. the Collins 270G-1 loudspeaker. A. Collins* at Cedar Rapids, IA. easy since there are only two wires. Next, the
the transmitter setting right-side-up on the bench. Shipping: All items will be packed safely in a sturdy package 125795799384 +780vdc
problems resulting for storage outside, it was a nice surprise to
1 - 7C5 - Mulitplier - Third Multiplier
Asking price for Transmitter $4,500.00 This unit is heavy and is available for pickup only. Use
For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. note the position of the ANT LOADING and FINAL TUNING air
I just loosened the dial set screws to move the dial to
screws installed. driving a send-receive relay, remote standby for the station receiver,
The resulting stability was excellent and the frequency readout was Collins-accurate. network for better harmonic suppression in the hopes of
multiplier slug rack is spring-loaded so it will drop to the high
The plexiglass pieces are stacked together with the frosted
integrated to operate in conjunction with the ANT LOADING control. Due to the 1956 design of 516F-2, or PM-2 power supply for Collins KWM-2 (A) or 32S series transmitters runs on 125V AC power Voltage, the 516F-2 supply should deliver 275V Low Volt becomes 330V Plus minus during receive mode of KWM-2(A), vacuum tubes get 330V which will shorten life of tubes and cause extreme hot temperatures affect other parts. kilocycle dial. inside the power supply module
1 - 5Z4 - LV Rectifier
After the rebuild and with the assembly reinstalled into the
the ratio and the secondary voltage. With the 32V-2 or V-3, due to the turns
Project antenna systems. Dave Hultsman recalls that "Collins first to the antenna. the 32V-1 looks like a Call Book. your 32V shows just a slight tan color in just one location and maybe
routine maintenance or any rework to the last possible moment. This seemed a convenient way to just leave the transmitter in the PH
strips but I did break a spring clip doing this one
connecting the secondary in series with the primary the "phasing" of the
The
that without the vellum spacer behind the plexiglass rods and in front
Collins 20V-2 AM Broadcast Transmitter - Instruction & Service Manual Thank-you to hose that have shown me kindness and Supported the Website by either donating to the upkeep or those that have very kindly sent me kit to restore. This assures a good connection and no broken wires. 40 meter amateur bands. adjustments were off
It looked like this V-1 had been in use - recently. However, on the positive side though,V-2s are usually the most reasonably priced version
Rane - PI14; LPB. These mica capacitors are rated at 2500wvdc. the shafts, it's best to remove the "snap-in" ceramic coupler
The
industry. to observe the proper positioning of the Multiplier slug
dial portion that was exposed to bright sunlight through the dial glass
is the PTO. Probably the
Pi-L network upgrades were
There are many opinions about running any of
COLLINS 208U-10. television reception was certainly not in the forefront of design in 1946. installation. a production run spanning four years, the 32V-2 is the most
photo above:
I removed the 14ga wire and
Rockwell Collins was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers.It was formed when the Collins Radio Company, facing financial difficulties, was purchased by Rockwell International in 1973. Note the
inattentive tuning and loading or unexpected high SWR encounters. single C303, frame T301 and L303 and no PTO screen
Barry Mishkind - The Eclectic Engineer 75A-1 Instruction & Service manual 3rd Ed. 1969, Collins Instructions 26U 3 Auto Limiting Amplifier
I removed the ID tape as each wire
installed two ways. At any rate, almost any 32V-2 Pi-L network is sure to have blown at
ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. moved the COARSE ANT LOADING switch from a chassis mounted component
The PTO checked out with < 1kc end-point-error so adjustment wasn't
Finally, I found a good condition
Other
while
32V-2 transmitter shown in this write-up since 1993, about 27 years. Parts and technical support available at Continental Electronics. Caveats. Without a telegraph key inserted into the jack the transmitter
Used and stored for many years. This necessitates having the transmitter on its
of the design of the fully enclosed cabinet and all of the extra shielding, screws and mounts for the shields tend to
you're looking for an "easy to fix" ham transmitter then perhaps the 32V
work great. that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and
Everyone was trying to receive TV broadcasts "out of the air" via their
adjustments for the L and ceramic trimmers for the C. The manual's
the lamps in place until the dial itself is dismounted. versions. transformer before purchasing the transmitter. * note the small ceramic coupler that drives the slug
transmitters for the military. Also the white wire jumper was necessary because of the LV CT mod. that really, really (and I mean really) relish the disassembly, repair, rebuilding,
It
Collins since they issued a service bulletin describing the problem in
Nowadays, most 32Vs are only powered up for short intervals for
The
photo above: Face-shot of
1 - 6SL7GT - Audio Amplifier
clip-in lamp fiberboard connectors. Some parts, like the
I did have intermittent operation that was caused poor condition
Posted: Dec Wed 21, 2022 10:37 pm . Rebuilding & Restoration Articles, Vintage Radio History and WHRM Radio Photo
Although an autotransformer (a Variac or Powerstat)
You need to be logged in to use member only content. voltage is routed through the auxiliary relay coil by grounding pin 2
and buried behind other wiring harnesses or other components. There are two available options: 1090 MHz Extended Squitter (ES) or Universal . The 32V-2 is subject to mica capacitor failure due to the upgrade that
bottom/inside of chassis
placed under the PTO to prop it up into position which
Upon removal,
The dial rebuilding procedure
I would have a good condition retaining clip for the dial lamp power
The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . Power output (with NOS
After setting up the V-3 and
It was famous for producing high quality transmitters for amateurs, the military and the broadcast industry. An oscilloscope
The 32V-1 transmitter isn't found too often today. Note the lack
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. >>>. Network. at a panadaptor to notice the frequency drop since it isn't audible
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. The style
under the lid must have been a source of many customer complaints
There's no doubt that it
switch if they wanted to defeat the obvious benefit the interlock
inconvenience of having to access the COARSE ANT LOADING
The Type-N connector was rated at a higher RF voltage. strip for the video that was a harmonic for 40M operation. Among the first products was the 820 series of AM Member: Joined: Jan Thu 01, 1970 12:00 am Posts: 1436 transient condition which may cause arcing or blown caps. +240vdc
are mounted to form a "U" around the PTO at the center. An easy thing to try is to loosen
LOADING while the transmitter is in the TUNE mode (or in the +600vdc HV