[HBR] Fwd: Re: Partially balanced mixer

[Paul Dulaff]

Sorry folks, I meant using a beam deflection tube like the 6JH8. The 6JH8 is functionally very similar to a 7360.

Has anyone any actual experience using the 6JH8 as a first mixer.

Paul - WB2NMI


----- Forwarded Message -----
From: Paul Dulaff <pdulaff at embarqmail.com>
To: HBR Receiver List <hbr at mailman.qth.net>
Sent: Tue, 13 Dec 2011 16:54:06 -0500 (EST)
Subject: Re: [HBR] Partially balanced mixer


Does anyone have experience using the 6DJ8 as a first mixer in a reciever ?



----- Original Message -----
From: Ian Wilson <ianmwilson73 at gmail.com>
To: HBR Receiver List <hbr at mailman.qth.net>
Sent: Tue, 13 Dec 2011 13:15:33 -0500 (EST)
Subject: Re: [HBR] Partially balanced mixer

I tried the 6DJ8, set up as follows:
  - 1k tail resistor
  - grid bias set for about 30V (i.e. about 15mA per triode)
  - B+ 150V or lower

This works pretty well also, with useful suppression when the
inputs are quite large (5v peak) (remember that my application is
primarily for a TX mixer).

Increasing B+ didn't increase the output noticeably.

73, ian K3IMW
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