[Heathkit] Heath Apache BFO questiom

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You mean the Mohawk?  Apache is the transmitter.

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________________________________
From: heathkit-bounces at mailman.qth.net <heathkit-bounces at mailman.qth.net> on behalf of John King via Heathkit <heathkit at mailman.qth.net>
Sent: Sunday, October 21, 2018 5:41:33 PM
To: Heath List; heath at listserv.qth
Subject: [Heathkit] Heath Apache BFO questiom

I have a Heath Apache with a VERY NOISY BFO control. The BFO control has a shaft that goes into a box on top of the chassis. Out of the bottom of the box housing the control , two wires through the chassis to the a tube socket
When I turn the BFO knob a loud scratchy noise is made in the audio. My question is: What is inside the box that is turned or switched by the shaft going to the box. Is it a variable capacitor or rotary switch???  I don't want to go into the VFO box until I know. The schematic is not clear about what is inside the cox.
Your input will be greatly appreciated.
73, John, K5PGW
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