On Sat, 2006-03-25 at 23:33 -0600, w6kip@kipwilliams.com wrote:
I'm starting my hunt for a Corsair and hoping to find one in average
> condition. I won't be concerned with cosmetics or the average wear and
> tear that comes with any 20+ year old radio. What would be considered a
> 'fair market' range of prices? Was the Corsair produced and distributed in
> large number? Am I apt to find plenty to choose from?
>
They are about and for sale on occasion. I have one I'm working on getting
ready to
sell. A Corsair II with CW filter.
> I'm also trying to get the run down on their performance. Anything that
> makes them really stand out?
>
The Corsair II uses Ulrich Rohde's favorite transformer (Anzac) circuit for RF
stage and
first IF stage. His favorite for intermod performance. And they do work very
well. It
has an "attenuator" which actually removes the RF stage so the input goes
directly to
the double balanced diode ring mixer. All designed to give the best possible
intermod
performance. The IFs are much like most other Tentecs with 9 MHz IF and a 6.3
MHz IF for
passband tuning that really works well. It receives 18 MHz on the opposite
sideband
otherwise it would have too many spurs on transmit.
Any known issues to be aware of? What are the
> differences between the Corsair and the Corsair II? Can I expect a II to
> cost more and is it worth it? As long as I'm asking all these questions,
> given the age and price range (under $450 I'm hoping), would I do better
> to look for another Ten-Tec model? Anybody owned or operated one of the
> Corsairs who'd care to offer their analysis?
>
The passband tuning is very effective. I don't think the CW filter is needed.
With the
two SSB filters and the pass band tuning you can get the response curve down to
100 Hz
or less. With the CW filter you can't do better but you can choose your
preferred CW
receiving pitch.
> I appreciate the experience and knowledge of this group. Thanks in advance.
>
> Kip Williams W6KIP
> San Diego CA
>
PTOs do wear. The frame may not hold the outer race exactly perpendicular to
the shaft
and so the wear is different around that race. I have rebuilt my PTO, but I
selectively
left out one thrust washer and at the low end of the band (where the spring
loading is
least) it will wander a bit. I need to take it apart and put in that last
washer to
preload things more.
The PTO knob is very light. I like my tuning much better after I made a 2"
diameter by
nearly inch thick solid aluminum knob to give some heft to the tuning.
Lots of receivers will have lost some of the polished metal inserts from the
knobs. Has
no effect on their performance.
I won't sell my Corsair II for $450. That's below its value, I think.
--
73, Jerry, K0CQ,
All content copyright Dr. Gerald N. Johnson, electrical engineer
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