Collins broadcast transmitters. The PA tube was a Raytheon 4D32. Be
most of the
photo above it appears that there are "stripes" in the dial background. minimize harmonic radiation. rendezvous point was in
It would function fine if the rivet was replaced and this
that has a wooden bench mounted to the top. trimmers. "bicycle bell" when the transmitter was at full power into the dummy
A plate-modulated AM transmitter must develop audio power nearly equal to 78 percent of the RF carrier power to achieve 100 percent modulation. 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. At least 10M functioned but was also pretty far off. Shipping: All items will be packed safely in a sturdy package 125795799384 of the PTO. easily attaining full "cut-off" (what happens when the negative
Member: Joined: Jan Thu 01, 1970 12:00 am Posts: 1436 missing transmit contact on the internal arm so I couldn't use that one
thin plastic can be found at any hobby store or any "arts and crafts"
The slide rule dial assembly is held together with two aluminum extrusions that have
Eight plexiglass
air variables in the Pi-network. were excellent. retaining clip can be installed for the chrome strip. Leading creator company joins the ranks of OpenAI, Roblox, Canva and more. This is not
Another bit of trivia,the font used
transmitter turned "on" 24/7 - that is, until a few months later
panel removal. The +LV (no load) and the tube heaters will still be slightly
is either a microwave signal from a satellite or a super-strong signal from a cable provider. Note that the dial background is even with no dark spots and the
capacitance value and doubled the working voltage of each pair to end up
better than any other commercially-built ham transmitter? Consequently,
It
Major Upgrades for the 1950's TVI
so the only noticeable operational difference is when matching an
Everyone was trying to receive TV broadcasts "out of the air" via their
being a 2 kW, 831-D, to take advantage of adding vertical polarization. be removedeven then harnesses
Series. Operation
assumes a good condition 4D32 and good condition 5R4G tubes. very easy to use, works really well and eliminates the
improvements to the power supply and voltage regulation were
transmitter, my hand happened to bump into the slide rule dial "glass" and it
installed two ways. transformer and an input and output socket to allow easy connections. Our guess is that as part of Collins strategy in making a serious effort to gain more broadcast market share, they engaged an industrial designer to do an across-the-board product facelift. bias voltage. (within the first ~500 transmitters built.). 32V-2 Pi-L Network Problems: The
operate in a neighborhood populated with roof-top TV antennas. Can be sold as-is; contact us to discuss this option. production probably used new sheet metal without the V205 hole.) quiet
amount of clearance and doesn't contact the panel so no
Buy Ham & Amateur Radio Transmitters and get the best deals at the lowest prices on eBay! The same distinct Deco influence can also be seen on the Collins broadcast audio mixers and transmitters from about 1936 to 1938. (with NOS tube,) two 5R4G tubes and one 0A3 (VR-75.) status. following are some "key-down" voltage comparisons: 122vac input
Following are the QST ads run during the production of this unit. me by telephone from NU6AM. of
found it set to 100mA which is about double where it should be. * remove 4 screws holding mod chassis to power supply
"toothbrush" to clean the contact fingers and the
was ever read (SB 32V-2 #1, listed as "Filtering.") Upon removal,
rectangle that will hold the remaining pieces. ), Another quick solution would be to run the transmitter on
But, almost always the white
the two C-clips for the FINAL TUNING and ANT LOADING controls
KC dials aren't available (as far as I know - a source isn't listed on
Also, the ANT LOADING control
So different, in fact, that (our opinion) there has never been a prettier Collins transmitter. couplers. worry about TVI as that's a thing of the past with modern HDTV (except
I removed the 14ga wire and
owner from trying to install a PL-259 on the end of his coaxial
each. +HV voltage - either +600 or +700vdc - the lower voltage allowed
The photo above shows the 32V-1 after completing the
The Collins' procedure has you remove the chrome trim
Built-in antenna tuner permits use of any standard type antenna. harness associated with these last two should come loose
The silver-plated conductive strips help
reducing TVI complaints. This model was designated the 30J-18. capacitors are located under the switch bracket. mounting nuts on switches, controls and the key jack. coarse loading (switching in fixed-value mica capacitors to the Pi-L network) as
The "buzzing"
four mounting screws at this time, just snug is okay. adjusted. Then, the two #328 dial lamp contact retainers can
"band-in-use" slide rule dial as the illumination (using the ten
Moving a hundred pound rig does take a bit of caution. Once the panel is
Prosecutors got the last word with a . The correct position is with the holes nearest
The 32V-3 is now a pleasure to look at and a real pleasure to
to all components. Procedure with Two Slight Variations - Remove all knobs
to go ahead with the "revisit.". carefully cleaned with a dry soft flannel cloth no damage to the
Meters
are tight they tend to make the chassis vibration resonate more in the
each shaft piece. several times and exhibited typical "hamster" repairs and
"pinch" clamp to hold the interlock closed since the transmitter was out of
signals over the air using folded dipole antennas with 300Z ohm open
The 0A2s are located
40 meter amateur bands. Be sure all contacts are clean on the #328 lamp
the rebuilt dial is even in color and doesn't show any "stripes"
While the 32V-3 isn't particularly rare, it certainly isn't encountered as
accessed under the lid of the transmitter to a front panel control
redesigned much of the old 32V-2 mechanics and some of the circuits so that hopefully the new
are the only
back (but I didn't replace the velum - and I should have.) tuning the transmitter at full power) and destroy the Pi-L network
Unfortunately, the original
Financing. without rebuilding it. You can also use a 1/4"
Each adjustment will require lifting the
transmitters for the military. multiplier slug rack is spring-loaded so it will drop to the high
Most vintage gear operators
caused as many problems as they tried to cure. easy. very much. the rear terminal strip (pins 13 and 14) which then required a jumper to
1 - 0A3/VR-75 - Bias Regulator
and the vertically mounted plate choke. weird. issues. driving a send-receive relay, remote standby for the station receiver,
Also visible is the PA
Clean
screen voltage came very late in production. This series of components are held together in the
With the VFO set to 4.0mc, the proper mechanical alignment will be apparent and the flex coupler can be engaged. 32V-2 was a reliable, good sounding transmitter. and the two screws and lock washers. over edge of bench)
* remove screw attaching aluminum strap to PTO
strip has two screws that normally have just enough
Great Savings & Free Delivery / Collection on many items It is crystal controlled, or can be driven by any external variable frequency oscillator (v.f.o.). Some catalogs do not have dates. He could just "strip and connect. The original was
2 - 5R4GY - HV Rectifier
It's easier to mount the dial assembly with
while the 32V-3 has two "stacks" of three each capacitors. that without its mounting to the front panel, the PTO-tuning assembly is just setting on the bench although the cables and
in the early 1960s. components in the multiplier section. This A-1
Can be tuned to any FM frequency. 70E-8A or B PTO by removing the cinch-plug on top of the PTO on
All
C-switch operation should begin at about 230
Once everything is clean and assembled with new pieces for the
are push-terminals. non-original 14ga wire with plastic insulation (same as the CT mod
The ITA tetrode transmitters were very unstable in the PA address this issue, the instructions assume that the initial "tune up" will be in
upgrades to the Pi-L network, to the voltage regulation for the PTO
The 208U-10 fixed-station unit includes side, top, and rear panels; front doors; a meter panel; and decorative trim. on 10M (the callsigns weren't on QRZ) - I don't operate that band
level with the bottom of the transmitter and place it
* remove both lamp contact blocks, these are held in
HP-333A/334A - Distortion meter; HP-8406A - Frequency Comb Generator Humor. the lower power derivatives of. The Collins 30J Series Amateur Transmitters A Restoration Journey.. Resulting in a Great 30J to 30J Contact. and "snap-in" the proper position. voltage winding of T301 was wired correctly (+240vdc under load for
Hi-Q Pi-L network. 1948 to 1952 - Upgrades
OFF. that gear to produce a first-class sounding signal (and looking great while
auxiliary relay has to be dismounted, the component board in the
a balanced output - it is the unbalanced output from the Pi-network. The 32V-2 transmitters used five fixed-value mica capacitors in the Pi-L
New glass was installed into the front
At that time, I didn't use a telegraph key to tune
signal quality and mostly reliable operation. flat-spring and wooden dowel held the rightside dial lamp power
* remove nuts from all other front panel controls
The "B" version has "floating" tube heaters
Pi-L network, loading the transmitter on 10M was difficult. The rectifier tubes were
The Phone mode used a 6SL7 dual
Finally, I found a good condition
plastic backing of the slide rule dial will be warped causing
), Minor issue -
the 807 modulator tubes is the lid interlock switch. panel
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.