[Boatanchors] Relay WTB and your experience with Nuvistor tubes

[Glen Zook]

I haven't had any problems with Nuvistors!  However, make sure that the B+ on them isn't too high.  Basically, keep the voltage below 100 VDC if possible.  A little higher is probably OK, but not much.  Otherwise, the tube life is cut substantially.
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
From: "bonddaleena at aol.com" <bonddaleena at aol.com>
To: boatanchors at mailman.qth.net
Sent: Sunday, September 11, 2011 11:28 AM
Subject: [Boatanchors] Relay WTB and your experience with Nuvistor tubes




Hi, I am in need of a coax relay. It is a Dow-Key type DK2-60B type. It is a DPDT relay with an internal jumper in the de-energized position. It has 4 connectors.
I'll take either UHF or N connectors, any voltage coil, and any quality mfg.
I have a BNC version of this relay, but would prefer the larger model.

On the subject of the Nuvistors.... I have a LOT of vintage equipment that uses these tubes. 
(I collect Parks and other Nuvistor converters and preamps) Why? I have NO idea!! ha ha
I have been purchasing many spare 6CW4s and 6DS4s as I come across them for a good price. I have experienced a high failure rate with these tubes. Both in equipment as received and some of the spares I have purchased as well.
I have thousands of vacuum tubes and the failure rate of the Nuvistors seem to be much, much higher than the 7 and 9 pin jobs.

Comments? Construction problems with the small tubes?

I have plenty of spares, but just wanted to ask the group if my experience is normal.

thanks!!

ron
N4UE
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