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Author Topic: Knight T-175, good or not?  (Read 2279 times)
KC5TEK
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Posts: 5




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« on: September 07, 2003, 09:56:13 PM »

Greetings,

This weekend I picked up a Knight T-175 for $10 at a small sale.  I've been told it works but have no means to test it just yet.  

It is missing the top cover and has some gunk on the top of the chassis, most of which I have removed with a damp washcloth.   What are the specs on this beast and would it be worthwhile trying to find the case for it and getting it on the air?  Is it a good amp, or should I just yank the tubes and dump the rest?

73,

Jeremy
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K7KBN
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Posts: 2833




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« Reply #1 on: September 08, 2003, 12:15:55 AM »

Use Google and search around the 'net.  There's a ton of information there.
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73
Pat K7KBN
CWO4 USNR Ret.
WB8JKR
Member

Posts: 45




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« Reply #2 on: September 08, 2003, 02:18:50 PM »

 Its worth about $10.00

Mark  WB8JKR
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WA9SVD
Member

Posts: 2198




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« Reply #3 on: September 09, 2003, 12:42:37 AM »

I'm trying to remember that amp.  I know (then Allied Radio) had an amp that might have had an option for 10 M or 6M options, using sweep tubes.  That was then, and this is now,.  Replacement tubes alone would cost an arm and a leg, probably more than the amp is worth, and unfortunately, much more than you paid for it.  
    You could consider rebuilding it with a current tube compliment.  (And possibly sell the tubes installed on E-Bay if they are good.)

    Give us a bit more info on the amp:  Supposed frequency, tube compliment, etc.
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WA4MJF
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Posts: 1003




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« Reply #4 on: September 13, 2003, 12:27:23 PM »

I think it is an HF AM/CW transceiver.

73 de Ronnie
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K3UOD
Member

Posts: 145




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« Reply #5 on: September 15, 2003, 02:16:36 PM »

Ronnie,
You're thinking of the T-150.  A friend of mine built a T-150 back in the '60s.  It was a pretty decent rig.

The T-175 is a 6 & 10 M linear amp.  (Though I suspect that most of them were used on 11 M.)
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WA9SVD
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Posts: 2198




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« Reply #6 on: September 16, 2003, 01:16:56 AM »

K4UOD:

    Thanks for the answer.  I remembered that amp, and when I considered one (at the time) to go along with my Knight-Kit TR-106, 6M rig, I was advised that the sweep tubes used were not very efficient on 6M so would give only a few dB improvement in signal.  (Remember, in those days amps, etc. were rated in DC Power INPUT, even if the output power was a "piddlin'" amount.  An increase from the TR-106' 15 W.input(and 8-10W output)  to 150 W+ input sounded good, but if the output on 6M was only 40-50 W at best, the amp was hardly worth the expense or effort.

    The amp may be modifiable with more efficient tubes that will allow more efficient operation on 6M.  I doubt it has any value for use on 10M, as most modern rigs are already 100 W. output.
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K9FE
Member

Posts: 8




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« Reply #7 on: October 25, 2003, 08:27:22 PM »

Wow, a flashback....The T-175 had 6JE6 tubes, of course the 6JE6A was usually replaced with 6LQ6s for about $4.95 each, in 1972...those tubes now are $30-4o each now.  I used one on 10 but it was so limited I think it lived its life on a shelf.  $10?  about right since some CBer probably fried the tubes and the power supply is a little lame.

73 de K9FE Mike
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