[Milsurplus] [EXT}Re: [EXT}Re: [Army-Radios] TCS Antenna Matching, Again.

Thu Jan 28 08:57:41 EST 2021

Hi Tim

  The N female connectors on mine were installed the same way with the flange mounted on the face.
I'm guessing the TCS on the Bowfin had its mod with the 239 ctrs early on as it seemed the 239 ctrs were being mostly used then and maybe later , say in the 1950's, type n ctrs became more in use. Though the 239 ctrs would work just fine at the freqs used on the TCS.

Paul
N6FEG

________________________________
From: Tim <timsamm at gmail.com>
Sent: Wednesday, January 27, 2021 1:13 PM
To: Thekan, Paul <Paul.Thekan at cpii.com>
Cc: Rob Lee <rob at k7tgu.com>; milsurplus at mailman <milsurplus at mailman.qth.net>
Subject: [EXT}Re: [Milsurplus] [EXT}Re: [Army-Radios] TCS Antenna Matching, Again.

CAUTION: This email originated from outside of Communications & Power Industries. Do not click links or open attachments unless you recognize the sender and know the content is safe.

Hi Paul - Although I cannot attest to its pedigree, the TCS T/R aboard the USS Bowfin sub at Pearl Harbor each have SO-239 type panel connectors.  I don't know if those are "original" or maybe Hamm-ered by a previous owner who may have donated them to the boat.  Bowfin TCS installation photo here - about halfway down the page: http://www.n6cc.com/tcs-radio-set/

Also note that "they" got the antenna and receiver cables reversed as they are connected to the transmitter...I did not get a photo of any associated "tuner" aboard at the time.
Tim
N6CC

On Wed, Jan 27, 2021 at 12:54 PM Thekan, Paul <Paul.Thekan at cpii.com<mailto:Paul.Thekan at cpii.com>> wrote:
30 years ago I acquired a TCS pair xmtr and rcvr that had type N ctrs on them. I commentated to the seller what a nice job he had done on the ctr mod and he told me that is how his father , a ham, had  'procured'  them from a ship that was getting retrofitted at the Mare Island Naval base where he worked. So it looks like the Navy had done the mod with the N ctrs and they did a very nice job.

Paul
N6FEG

________________________________
From: milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net> <milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net>> on behalf of Rob Lee <rob at k7tgu.com<mailto:rob at k7tgu.com>>
Sent: Wednesday, January 27, 2021 9:42 AM
To: 'milsurplus at mailman' <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: [EXT}Re: [Milsurplus] [Army-Radios] TCS Antenna Matching, Again.

CAUTION: This email originated from outside of Communications & Power Industries. Do not click links or open attachments unless you recognize the sender and know the content is safe.

This discussion brings up a question. Is there information available on the web on what I assume to be an N connector field change to the TCS? I encountered several TCS sets aboard U S Navy ships while in the service with this modification. Wondering if there were other changes done internally to the units or perhaps these were units only to be used with the TN-233/SRC Transmission Line Tuner?

Rob
----- Original Message -----
From: Mike Feher<mailto:n4fs at eozinc.com>
To: 'MICHAEL ST ANGELO'<mailto:mstangelo at comcast.net> ; 'milsurplus at mailman'<mailto:'milsurplus at mailman'>
Sent: Wednesday, January 27, 2021 07:37
Subject: Re: [Milsurplus] [Army-Radios] TCS Antenna Matching, Again.

I do not recall Mike as I built this about 25 or more years ago. I have used it from 160 through 40 with no problems. I used Jerry Sevick’s book as a reference. Another nice advantage is that one can now use a 50 ohm power meter like a Bird thruline to measure power. 73 – Mike

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

From: milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net> <milsurplus-bounces at mailman.qth.net<mailto:milsurplus-bounces at mailman.qth.net>> On Behalf Of MICHAEL ST ANGELO
Sent: Wednesday, January 27, 2021 10:24 AM
To: milsurplus at mailman <milsurplus at mailman.qth.net<mailto:milsurplus at mailman.qth.net>>
Subject: Re: [Milsurplus] [Army-Radios] TCS Antenna Matching, Again.

Mike,

Which cores did you use for your RF Transformer?

Mike N2MS

On 01/27/2021 10:20 AM Mike Feher <n4fs at eozinc.com<mailto:n4fs at eozinc.com>> wrote:

Hi Dave –

I have mentioned this previously several times. My preferred method was to use a 4 to one RF transformer. A UNUN where the 1 goes to the set and the 4 goes to the resonant antenna. This has worked for me just fine on the TCS, the BC-474 and the WS-19. I am sure it will work with a lot of others as well. 73 – Mike

Mike B. Feher, N4FS

89 Arnold Blvd.

Howell NJ 07731

848-245-9115

________________________________

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