[HBR] Dons new reciever

[Paul Dulaff]

6BA7 is somewhat noisey. These were used in the 75A4. A typical modification on the 'A4 is to reconfigure the 1st mixer to a 6ES8 dual triode configured as a Pullen Mixer. Better intermodulation distortion performance and less noise. My HBR has this setup and works well.

Paul - WB2NMI

 ----- Original Message -----
From: match at ece.utah.edu
To: hbr at mailman.qth.net
Sent: Thursday, April 2, 2009 12:14:03 PM GMT -05:00 US/Canada Eastern
Subject: Re: [HBR] Dons new reciever

On 1 Apr 2009 at 12:00, Don wrote:

>  But I am still deciding on which mixer
> to use for the front end (7360, 6BE6). I have decided 20 times but keep
> changing my mind. 

How's about a 6BA7?

Marvin

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