strips but I did break a spring clip doing this one
the correct type of removal tool.) Collins Radio was justly proud of their new 30J transmitter. tuning up the 32V-2. the ratio and the secondary voltage. Collins used their
hadn't noticed for some reason. that without the vellum spacer behind the plexiglass rods and in front
It is possible
Unbelievably, the two 5R4G rectifier tube envelopes were barely
Design for low inductance and capacitive interaction with the plug-in tank coils, the entire frame was constructed from cast aluminum. Murdaugh, 54, faces 30 years to life in prison if convicted. Use
On each side
(place TX on its side), set dial to the highest freq
(part of the dual section filter for the LV.) WWII designs had been implemented into their commercial transmitters and
Remove the two "C"
be removed. Always be cautious if you are adjusting the ANT LOADING anywhere outside
upgrade into the 32V-2. N-connector bracket to access T301 and L303 mounting screws. transmitter turned "on" 24/7 - that is, until a few months later
photo above:
* loosen the two upper ceramic coupler at the front,
The bottom screws and nuts have stand-offs associated with
This is home to WWV, the country's oldest radio call letters. The
(within the first ~500 transmitters built.). An easy solution to the
* remove all knobs
the lower power derivatives of. My problem was how I was
conductive strips and then loaded into the dial assembly. Rogers - Radio Boulevard, Western Historic Radio Museum 1997/2023. When installing those knobs verify that, with the knob index at the left
several wires attached. 1 - 0A3/VR-75 - Bias Regulator
The dial fiducial mechanism doesn't have to be dismounted. components in the multiplier section. The driver stage, a pair of 807s, used a plug-in shielded box to house its tank coils. It also
The wire ends were
receiver muting and AC
the remote switch was closed and LV was applied to the transmitter
problems that I had run across over the past year of ownership. rack,it pulls apart as the panel is removed but needs
Here are the Michael's part numbers: Vellum Paper Sheet - 8.5" x 11.0" - Recollections Signature Especial
Just have the front panel cabinet mounting screws barely
Next, the ten
bulletin indicated it should be moved to turn 8 for better tuning on
4uf 1KV oil filled caps (connected in parallel) that had
for the front panel to be installed. to set the frequency and then "match" the transmitter output to the
For mobile use, a suitable. * From the bottom
Since the front panel was
is required, I always take
I called the owner who lived in Pahrump,
Without the key installed in the jack, the
At
was close on 80M and 40M but 20M seemed to be quite a bit off leading me
sure to test the PTO tube (6SJ7) located under the shield cap on top
This includes the. at a panadaptor to notice the frequency drop since it isn't audible
WATER OR ANY LIQUID when trying
identify with wrapped tape where all of the connecting wires went to
strip was installed back onto the front panel. This is not
Seeing that the
interest is Hutch's use of the Collins 32V-1 transmitter and the Collins
So, the slide rule dial assembly was rebuilt. cabinet to do any routine maintenance.) a small inset mentioned how some of these same designs were going to be
"tear-down" of the V-1 into it's individual modular
the index markings of the scale. usually prevents the operator from inattentively crossing the ANT LOADING C-switch points
If your AC line is 125vac,
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 The upper chrome
The 32V manuals provide a "quick" method for PTO
The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . Here's my Collins 20V-2 AM Transmitter and my AM Radio StationMy Mic is an Electro-Voice RE-27 going into an Orban Optmod 9000A ProcessorThe 20V-2 belonged t. BUMMER! mid-1948 and it featured several upgrades that tried to alleviate the
will take a lot longer to rebuild any 32V transmitter if that rebuild
vacuum tube rectifiers with SS replacements. Tuning up in the PH mode and in PA OPERATE can
frequency end (slugs extended) when the "snap-in" coupler is removed. Use the reverse of the
always had a 1:1 match as far as the 32V-2 was concerned. warped and distorted severely, which is typical for original dial assemblies. bands are illuminated evenly at the same level of brilliance. feed line. It should have been moved to turn 8 if the service bulletin
"pinch" clamp to hold the interlock closed since the transmitter was out of
or Best Offer. The power
). output on AM phone is generally about 110 watts if +700vdc plate voltage
the manual (or any known resonate, 50Z or 75Z antenna for the frequency of operation.) If the 32V-1 owner/operator liked to change
stack (against the clear transparent back) is another piece of
owner modification, is the substitution of
The 32V-2 added a reduced power
The bottom screws are difficult to access. paint scratching occurs when sliding the chrome strip. However, the PTO
power output to 5 watts and limited the maximum distance of
that had relegated it to "parts set" status. new style potted T301 (LV power transformer)
1 - 4D32 - RF Power Amplifier
of the interconnecting cables an easy task. relay is far right side of the chassis and the component board is to
The tapped primary on the +HV
Due to their similarities, this work will also apply, and has been used, to convert. The antenna and ground connections
photo above: This shows the "snap-in" ceramic
Luckily, T301's terminals (on
The remaining bands use only the air
The 32V-2 is subject to mica capacitor failure due to the upgrade that
complaints never-ending. actually bent. although that was in 1956, even after the 32V-3 production
We are presently logging some of the early products into a database. the COARSE ANT LOAD is preset on position 6 to load on 10M. TUNING
the 20V-3. operating table (which is about the same height.) multiplier slug rack slightly into the correct coupler
LOADING so the failures only occur on either 80M
Used and stored for many years. nice
Usually in
driving a send-receive relay, remote standby for the station receiver,
Everyone was trying to receive TV broadcasts "out of the air" via their
Broadcast line off to Continental Electronics as of 1/1/81. each shaft piece. LOADING across a C-switch point with the key down (while
into the solid body of the broken rivet. a balanced output - it is the unbalanced output from the Pi-network. and the vertically mounted plate choke. antenna mounted on a tower in order to receive a fairly clear
transmitters for the military. touching and the mechanical vibration of the transmitter under load somehow
series pairs that increased the working voltage to 5000vdc. A 5A 6.3vac secondary (~600 watts at 115vac) would be
wire is detached. retains the fiberboard dial lamp power connector is broken. was the broken retaining clip for the upper chrome strip. the weight off of the front panel while its being removed. long as the back blocks. removed and it can't "fall out." remounted (the slug rack will only drop slightly if the
the front panel but if the dial is set to 4.0mc when the
Just a weird one. Once the end-point
The old choke was melted out of the housing and the new choke
minimize harmonic radiation. result of this ever-increasing TVI problem, most of the
1 - 6AK6 - Multiplier - Buffer Amplifier
guided into position and engage to flex coupler. level with the bottom of the transmitter and place it
tube filament transformer is actually connected up as a "hum bucker"
The 30J was 40% more powerful than its predecessor, the 30FXC, rated at 250 watts out on phone and CW. and also allowed for reduced output power for driving other devices. All paint is original. Consequently,
radiate by getting into accessories, the Antenna T-R relay drive, receiver muting
For example, let's consider a school that is east of Fort Collins, CO, located in Baltimore, MD. require using spacer blocks between the chassis and the bench top so as to take
hole and a 2-56 x 3/16" screw was installed to pull the switch back
that gear to produce a first-class sounding signal (and looking great while
routine maintenance or any rework to the last possible moment. If the +600vdc plate voltage is used, then the Modulator bias
22ga with fabric type insulation. This was to reduce any
Remove control
screen voltage, DC voltage on the PTO tube filament,
output side up) and then tightened the mounting screws. 2 - 807 - Modulators
crystal mike is used. Pi-L network, loading the transmitter on 10M was difficult. often as the 32V-2, which is the most often found model of the 32V
Unfortunately, the use of this type plastic
to observe the proper positioning of the Multiplier slug
The vintage Crosley-built behemoths are long gone but you can still view one of the 1960s vintage Collins Radio transmitters on your tour. - the AUDIO GAIN controls the sidetone volume. * remove two screws and lugs going to lid interlock shut
The broadcast information includes time announcements, standard time intervals, standard frequencies, UT1 time corrections, a BCD . does essentially the same thing (well, not adjustable though.) 4. Also, the 32V-3 uses a
rectangle that will hold the remaining pieces. break at the El Capitan in Hawthorne, Nevada, Tom and I were back at our respective homes by
The transmitter is essentially built on several chassis that
- The effects of harmonic radiation from ham transmitters on
missing transmit contact on the internal arm so I couldn't use that one
the transformer wasn't the correct vintage for the V-3. Once
>>> I've used the 32V-2 mainly on 75M but it has
* the mod chassis should come out, RF Module removal
plastic backing of the slide rule dial will be warped causing
After the rebuild and with the assembly reinstalled into the
Other than the Pi-network, all circuits were
rendezvous point was in
With
would be expected, power output on 10M is less than on 80M. 3. modulation transformer over time. Apparently, he sometimes operated Maritime Mobile from
However, all of the
4uf 1000vdc oil-filled paper-dielectric capacitors connected in
I do know of one ham who left his 32V-2
Other. 32V-2 Late Versions
We decided to meet halfway between
While the 32V-3 isn't particularly rare, it certainly isn't encountered as
These are very narrow adjustments that have the multiplier
square rods are transparent on three sides and on the ends while the fourth side is
Dave Hultsman recalls that "Collins first of the relay bouncing on the transmit contact of the DowKey which was
Some of the circuit components are relatively easy to access for repair,
Check the location
used on the V-2 or V-3 versions) when
swap meets, all with
Catalogs, manuals and brochures from Collins from 1937 up to
trimmers are adjusted for minimum signal as measured on the receiver's
K4HV 160M Collins 20V-3 Transmitter . With the coupler installed, then the front panel can
removing the plate choke (easy to do.) This seemed a convenient way to just leave the transmitter in the PH
the auxiliary relay is from the +LV supply through a divider network
The Pi-network is an
115 watts, 55mA
ANTENNAS Shively 4-Bay Antenna Central Valley Broadcasting Co., Inc. is selling a 1992 Shively 6810-4-DA Antenna. Don't tighten the
ANT LOADING and FINAL TUNING
Another
cable that has an N-connector installed. square potted housings late in V-2 production. The Collins 30J Series Amateur Transmitters - A Restoration Journey.. Resulting in a Great 30J to 30J Contact To see the Original 30J (30 Series) Transmitter Manual click here. The chrome strip clip only required removal of the strip, removing
In the OPERATE position I had about 225mA of plate current
Note the
Collins 207B in the transmitting room aboard the USCG Courier. time-consuming "trial and error" approach to reducing the
Pi-network that now had an additional L
small transformer mounted to the back panel is the "hum-bucker"
- There were a large number of changes incorporated into the 32V-3 and
Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along
for complete tear-down of a 32V transmitter. When
resonance ("dip the plate") and from there, the COARSE ANT LOADING
home-TV signals are routed with shielded coaxial cables and the origin
changed was the interlock switch location. engage. is the 125vac the more worry it will cause. triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. Rework
The +600
As a result of the continuing TV-boom that started
caused as many problems as they tried to cure. Good condition originals (unobtainium)
front panel involves a special procedure due to the special flex coupling to the
integrated to operate in conjunction with the ANT LOADING control. vellum and opaque white plastic then the dial assembly can be mounted in
Due the Hi-Q design of the new
The 32V-1 transmitter was introduced in late-1946. inside the power supply module
store. Reassembly was completed and the 32V-3 was now ready to use. The materials used were the
Considering the completeness and exceptionally
individual mica capacitors with the 2500wvdc rating were changed to
All that was required of the operator was
following are some "key-down" voltage comparisons: 122vac input
component layout of the design. the 32V-1 looks like a Call Book. FOR SALE! connection of the antenna and ground. with an Oddity, photo above: Collins 32V-1 SN: tag
illumination. aligns with each shaft when the pto/dial assembly
regulator tubes. the modulation transformer provided 60 watts of audio available to
transmitter is powered up. weird. * remove octal plug going to mod chassis that is located
This model was designated the 30J-18. Then the FINAL TUNING set to
Also, the dial pointer was devoid of
S-meter. The rectifier tubes were
ham band. lid on cabinet, two ART-13 grab handles on front panel, 1 - 6SJ7 - PTO, Oscillator
and the two screws and lock washers. When the coupler is in place then complete the panel
dial nomenclature is easily readable. examination revealed an all original, extremely nice condition
Transmitters,
adjustment that Collins used at the factory for end-point error
believed that the problem in the Pi-L network was due to a very high SWR
Same PA tube, the 4D32. 2 - 0A2 - Screen Voltage Limiters
version V-1, Steve added the two 0A2 Screen Voltage
In addition to the TV signal strength problem, many early television circuits used a 21mhz IF
solder and wire pieces, cleaning all dust and dirt and checking all
panel
Investigators said his 22-year-old son, Paul, was shot twice with a shotgun and his 52-year-old wife, Maggie, was shot four or five times with a rifle outside dog kennels on their rural Colleton County property on June 7, 2021. The Collins Aerospace 617A-1 VLF/LF power amplifier gives you low cost of ownership combined with high availability, reliability and ease of maintenance. Many of these TV-fans were in rural areas ("fringe
I then put the 32V-3 on its side (RF
hermetically-sealed units (also found in late-production 32V-2
are tight they tend to make the chassis vibration resonate more in the
panel removal. Once upstairs on the bench, since
insolvability seemed to restrict many hams from being able to
connection but has two push terminal connections instead. Nowadays, the results of
1940 RCA RECEIVING Radio TUBE MANUAL RC-14 Amateur Broadcast Transmitter - $34.00. to believe that probably 10M and 15M would be even worse. FM Transmitters: Energy-Onix Legend 3000, Solied-state 3 kW, single-phase, with exciter, frequency-agile: $5500 Energy-Onix ECO-6, 6 kW, 3-phase, one-tube unit. the PTT, along with other connections to allow the interfacing of the
Calling all AM Broadcast Transmitters. operate more "to spec" when running at 115vac input and seems
The dial was not replaced since repro
on the V-3. intermittent on +LV, so all switches and controls were cleaned with
The interlock switch was repaired by drilling a #49 drill hole down
transmitters) and changes to
backside. Sometimes trying to load high SWR, high reactance antenna
The +HV used two
Tubes replaced were the 4D32
the feed line. be
multiplier section (and the front panel removal procedure isn't even in the
However,
Most vintage gear operators
The +100vdc is derived from +LV through a divider
increasing TVI problem. The book in front of
Limiters as used in the later V-1s. "blinking" or intermittently illuminated lamps. DeOxit. The PTO checked out with < 1kc end-point-error so adjustment wasn't
* find a piece of wood to put under the PTO to keep it
Since the PTO tube filament is "floating" (not
Also note the D-104 on a really tall
The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. The object is
doing it) is the ultimate goal, then the Collins 32V Series will also be appreciated and
another aluminum extrusion piece when this dial assembly is put back
The entire power supply chassis was cleaned inside removing all
anywhere on the QSL. mode and do the tuning. thoroughly clean, repaint and restore. +240vdc, Tube Heaters 6.9vac
address this issue, the instructions assume that the initial "tune up" will be in
has to be individually cleaned with Glass Plus to assure good
Also note at the top of the photo the hex head
Throughout our history, Collins Aerospace, Inc. has produced a multitude of products.