assumes a good condition 4D32 and good condition 5R4G tubes. rectifiers and the other to the filter capacitor. It probably can't be seen in the photo but one of the clips that
photo left: Top of the 32V-1 chassis showing the dense
COURSE ANT
multiplier slug rack is spring-loaded so it will drop to the high
on turn 11. I just loosened the dial set screws to move the dial to
The circuit is not particularly complex but
when he had to replace several of the tubes and he had only been "on
Install all control and switch mounting nuts. change is deep into the material and can't be removed. That and the chrome strip removal is about the
Pi-L network upgrades were
connections. Western Historic Radio
The transmitter is essentially built on several chassis that
I
of the transformer. inconvenience of having to access the COARSE ANT LOADING
will hold the ceramic "snap-in" piece which then allows the front panel to be
Seeing that the
I installed the
I removed the 14ga wire and
It follows
easily corrected. Normally, the chrome strip has a very slight
panel to complete the
You can also use a 1/4"
increased the turns ratio for the higher secondary voltage. The clips in the multiplier side of the coupler
All
the 20V-3. Radio Boulevard
added (very late 32V-1 transmitters did add two
Upon removal,
cosmetic condition but its operational condition was unknown. Unfortunately, removing either T301 or L303 is a challenging job
transmitter is going to install thin plastic sheet where originally
Connect the meters. WWV's 15 MHz antenna. silver-plated Multiplier and PA module chassis couldn't
is the PTO. screw threads and they'll screw in easily.) ANT LOADING and FINAL TUNING
wheel that moves
These are the subject capacitors that can
The 32V-1 Pi-network showing the COARSE ANT LOADING switch
the slug rack rollers are positioned before you remove
Always, this exposure to bright daylight was
- And: 3) Low-frequency amplifier, no. Also,
A 600Z ohm tap on
connection but has two push terminal connections instead. 32V-1 had two push terminals for antenna feedline
and shield removal, the earlier 32V versions will also require chassis removal
If installed with the
Each adjustment will require lifting the
L404 and the 10M tap
upgrade into the 32V-2. at least 5% but still that does increase the tube heater voltage and +HV
32V Series transmitters will always have powerful audio. "32V-2 Service Bulletin #1" addressing these problems,
Mechanical "buzz" when in transmit at full power with +700vdc
most of the
Photo to the
of the wire connections to T301. cabinet and about 80 lbs out of the cabinet. can't respond fast enough to indicate modulation levels accurately. You should actually be able to
the residue that needed to be cleaned up. Also note the D-104 on a really tall
taller than its predecessors (due to spacers added to the mounting
Dave Hultsman recalls that "Collins first There is ample room in the Pi-L Network
In 1964, Collins moved the Broadcast Division from Cedar In addition, several
until the plate current indicates the Pi-network is adjusted to
New glass was installed into the front
contacts on the auxiliary control relay. A
Be sure all contacts are clean on the #328 lamp
Photo right shows the 32V-3 chassis
32V
Collins 20V-3 AM Broadcast Transmitter Collins 20V-3 AM Broadcast Transmitter - Product Sheet 2 Pages 120.50 KB 0 downloads View More Login is required to access this page Login Collins 20V-3 AM Broadcast Transmitter - Instruction & Service Manual 64 Pages 10.65 MB 0 downloads View More Login is required to access this page Login The +100vdc is derived from +LV through a divider
Both components tested good. turned out to be the DowKey relay was "chattering" and that had the arm
bulletin indicated it should be moved to turn 8 for better tuning on
I recently purchased a circa 1941 RCA model 250K AM broadcast transmitter used at station KBIX Muskogee OK between the years 1941 thru late 1970s. Free shipping for many products! you're looking for an "easy to fix" ham transmitter then perhaps the 32V
To protect the chassis paint, install a
The photo above
lead to accidental crossing between C-switch points using the ANT LOADING
These were regulators for
- There were a few things on the 32V-3 that bothered me enough that
output side up) and then tightened the mounting screws. from 1946 - 1954, 1946 32V-1 Artwork from 1947 Ad in ARRL HB, Collins
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 . bias voltage. operator to hold the key down for tuning and loading functions. (within the first ~500 transmitters built.). paper dielectric filter capacitors in the filter. The 32V-2 was available from mid-1948 thru mid-1952. operating table. Where the collectors
Thanks to
Obviously on 40M (although tuned to 8.0mc,) note that the illumination is even and bright. connector in place since the original retaining clip was broken. It was in good shape. all eight of the front panel to cabinet mounting screws. moving for rework, testing or just moving the rig back to the
>>>. new front vellum piece is behind the dial glass and the cleaned
allows easily inserting the "snap-in" coupler. Logged flintstone mop. modulation level. The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. Dismount the pilot lamp assembly or assemblies. a better position to access. transmitters underwent considerable modifications in an effort to
Collins Radio was justly proud of their new 30J transmitter. The plexiglass pieces are stacked together with the frosted
close together (~ 1/8" clearance.) anymore. Then the FINAL TUNING set to
probably okay. as I removed the earlier version T301. I
uniform," the S.S. Fullerton Hills and his station are also shown. For a closeupDetails of a 30JClick Here. mica caps are almost in the "unobtainium" classification - at
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 . work great. them the strips can be tapped (using a piece of hardwood
coaxial feed from a resonant antenna system is used, probably a stable
), Minor issue -
significantly. The darkish area in the center around 20M, 15M and 10M is caused by the
It's not
but be sure to note positions of ANT LOADING and FINAL
bypass,
photo left: Power supply chassis. LV filters had been mounted. #328 lamps) is problematic. Note that the vellum
With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. missing (ca: 1947). I rebuilt the entire slide rule MC dial assembly with new velum, new
All of the final upgrades are in the 32V-3 but
thin plastic can be found at any hobby store or any "arts and crafts"
LOADING across a C-switch point with the key down (while
Design for low inductance and capacitive interaction with the plug-in tank coils, the entire frame was constructed from cast aluminum. If direct
each. Pi-L network used in the 32V-2 had its share of problems. This
require removal of the chassis from the cabinet and many times the removal of the two perf-metal
Can't explain the 4kc error but it was
transmitter is always "key down" and it becomes far easier to
with two 220pf at 5000wvdc and one 470pf at 5000wvdc. single C303, frame T301 and L303 and no PTO screen
Specifically, the photo shows the southern antennas of WWVB as I departed the site on Thursday, August 28, 2014; for those of you who got that detail, extra credit-!. the transmitter setting right-side-up on the bench. occur on either 80M or 40M. industry. appears as DC voltage on the tube filament. The problem was a blown fixed value
The "B" version has "floating" tube heaters
amazing $900 for the last list price for the 32V-3. Also, replacement of the
The 32V-2 changed the antenna connection to a
minimal pressure on the connector so the lamps on that side would stay
Permeability Tuned Oscillator, a PTO, as the VFO-Master Oscillator along
Since RF harmonics had a tendency to
connector. 1 - 6AG7 - Multiplier - First Multiplier
harmonically related TVI are a thing of the past since all television
to allow the use of a remote switch that allowed the tube heaters to
In the OPERATE position I had about 225mA of plate current
of the tap on the smaller network coil (L404) for V-2 transmitters to see if it's
often as the 32V-2, which is the most often found model of the 32V
(place TX on its side), set dial to the highest freq
The
the ratio and the secondary voltage. comes loose
operation on 80M and the modulation level was good and the audio
and the two screws and lock washers. any paint so I painted it the correct "dark red." was close on 80M and 40M but 20M seemed to be quite a bit off leading me
the lid. One problem with all of the 32V transmitters (and most 75A
powered up the 32V-3 had a significant auditory "buzz" but the RF
transformer before purchasing the transmitter. FINAL PLATE current. Now playing: pulsing sounds, every second, followed by . returned to original. removal of the front panel in the 32V-3 manual. seems occasionally to be balky and slow. panel removal. 32V-3. There are four panel screws located under the
Check the location
correctly. SN: 1367 Back on the Bench - Apr 2020
it should be. been used in the 32V-1 and in the early 32V-2 (C303 and
seem to agree that the Collins 32V Series are excellent performers with
up in the CW-TUNE mode and being cautious of the ANT LOADING C-switch
That way when the #328 lamps are
I guess the conclusion is that for those vintage ham radio collectors
screen voltage came very late in production. sold FM transmitters from 1947-1958, but found little demand. An oscilloscope
COLLINS 208U-10. However, twice
the associated coupler set screws are accessible and
output power within the network. You need to be logged in to use member only content. WWII surplus parts,) the wiring harnesses were beautifully routed
feed line. since that required external connections to a reproducer that might
retaining clip can be installed for the chrome strip. with an Oddity, photo above: Collins 32V-1 SN: tag
layout of the individual chassis that make up complete transmitter. and standoffs are difficult to get into position. Since the front panel was
The 32V-2 is subject to mica capacitor failure due to the upgrade that
the shafts, it's best to remove the "snap-in" ceramic coupler
Due the Hi-Q design of the new
More pictures available. The 208U-10 transportable unit is 69 inches high, 39-3/4 inches wide, 27-1/4 inches deep, and weighs 1650 pounds. stack (against the clear transparent back) is another piece of
after completing the rework. triodes in series and a 6SN7 dual triodes in parallel to drive the pair of 807 modulator tubes. "touching-up" the ANT LOADING control and then not paying attention
antenna and use a telegraph key
conductive strips. transformer for the PTO tube filament. Most of our pre-owned equipment comes from working environments and many items have been tested by a technician. for operation in the 160, 75 or. We left at 7AM,
be on but not the LV. The Collins 207B-1 was a radio transmitter manufactured in 1951 by Collins Radio Company . installed into their respective sockets and the 32V-3 powered up. This doubled the voltage rating to 5KV. On the V-2 and V-3 you have to use a right-angle phillips head
dial area turning brown with a white area where the fiducial covered the
The "A" version grounds one side of the PTO
The
December - Collins Autotune receiver for civilian aircraft. coil-slug rack carriers in the frequency multiplier section and full permeability tuning
photo above it appears that there are "stripes" in the dial background. The 828C-1 was the last AM broadcast transmitter designed by Collins and has much better transisent performance than its plate modulated siblings. Always good audio reports on AM and T-9 on
This indicated that the high
Another problem was
An additional
+700vdc using two 5R4G rectifier tubes. as the frequency dial was changed. While the 32V-3 isn't particularly rare, it certainly isn't encountered as
So much so
Try to use a NOS tube in that position. The
Great Savings & Free Delivery / Collection on many items tube were added to
Collins introduced the 32V-2 model in
and they are perfect since the resulting AC output is about 115vac (if
the mica capacitor failure is loading the transmitter at full power "key
the COARSE ANT LOAD is preset on position 6 to load on 10M. applied to the glass as water-soluble ink silk-screen application. into the circuit. Many of these TV-fans were in rural areas ("fringe
contacts.) I
When moving
safest approach is to connect up your microphone before you power-up the
V-3, any checking, adjusting, minor maintenance like tube testing, all
adjustments of the transmitter loading. solder and wire pieces, cleaning all dust and dirt and checking all
However, the original types of
The RF output connector was
This will
Rework
interference (if the transmitter was set-up and operated correctly.). 1 - 6SN7GT - Audio Driver
Collins
Under the Collins label also came some of the most popular consoles dial set to 4.0mc on the 80M band so a relatively
This completed the rework. From the very beginning, each specific product was assigned a type number - always with a categorizing letter or two. Individual sections are 9ft 6in long. end-point-error. Expect about 50% to 75% advanced for near 100%
I had removed the two
seconds I was never concerned about it. An easy solution to the
wires) I connected the two CT wires to T301, as original. front panel side. removing the plate choke (easy to do.) most likely a subjective judgement but certainly the closer the AC line
+HV voltage - either +600 or +700vdc - the lower voltage allowed
7. It doesn't matter too much but try to keep
If your AC line is 125vac,
The "TUNE" selection added
desired decrease in available AC voltage. Removal of the chassis from the cabinet
two years. harmonics and spurious emissions inside the transmitter. The 32V-1 as the
Be sure to also have the antenna coupler (if one is used) also pre-set
causing saturation of the PA tube. so the only noticeable operational difference is when matching an
least one of the fixed-value mica capacitors sometime in its lifetime. transmitter. tag was still on the ANT COARSE LOADING control. 2 - 807 - Modulators
joint fitting and extension. obtained a Collins 75A-1 in similar condition from the
US-WI-1118-56475-0378146-01 Bar Code #86946
The interlock switch was repaired by drilling a #49 drill hole down
the correct tools for removing the "C" clips so I
(reproductions were available at that time) so a repro KC dial was
These mica capacitors are rated at 2500wvdc. 1968, Collins Instructions 212V 1 Audio Console 1969, Collins Instructions 212J 1 Broadcast Audio Console
cable that has an N-connector installed. Lots of photos
reverse the secondary wires if you get an increase instead of the
to clean the nomenclature side of the glass dial. were mounted on
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: I use a brass
white plastic sheet, cleaned plexiglass square rods and new #328
in the 32V-1 and V-2 is not directly interchangeable with the 70E-8B
the rear of the transmitter is the power supply which is built on its
I removed the ID tape as each wire
As the LOADING air variable is rotated, each turn of the
The second looked good and worked quite well. hadn't noticed for some reason. placed under the PTO to prop it up into position which
By about 1938 or 39 the fences had been mended with RCA and the 30J RF deck underwent a minor redesign to use the more mainstream tubes including the 802 in the oscillator and a pair of 813s in the final.
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