Well, I did not have a 2N3394 (NPN) on stock, so I cross ref the transistor and came up with a GE-20, RCA SK-3444/SK-123A and TCG85. I used the GE-20 because that was the 1st cross ref transistor I came across in my many junk boxes. I have used GE transistors in a few things and worked good. In this BFO, the GE-20 worked good with no birdies.
To: [email protected]; [email protected] Subject: Re: [Drakelist] Drake R-4C Passband Tuning From: [email protected] Date: Thu, 4 Oct 2012 11:18:13 -0400 Where did you get the 2N3394? I would like a few for stock. 73, Lee -----Original Message----- From: Eric Berty <[email protected]> To: drakelist <[email protected]> Sent: Thu, Oct 4, 2012 10:45 am Subject: [Drakelist] Drake R-4C Passband Tuning I have repaired the problem with the BFO. Originally, I was getting a BFO reading from 51.464 KHZ (USB) to 50.387 KHZ (midway) and would fade out to LSB. There were no shorts. I did measure 8.06 vdc on the stator of the passband tuning. The BFO transistor was pulled and tested. It did show a gain, but I was getting leakage on 2 settings for this transistor. The 2N3394 was replaced and passband tuning is fully operational. _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
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