[R-390] BFO question

[Osamu Hazawa]

Jim,

My BFO doesn't work too.
How can I find the center of the BFO frequency?
Is there any mark for mechanical center point on BFO?

Osamu Hazawa
http://www4.ocn.ne.jp/~pomerol/MyPage/menu0.html
----- Original Message ----- 
From: "Jim Miller" <jmiller1706 at cfl.rr.com>
To: "Kenneth" <crips01 at msn.com>; <r-390 at mailman.qth.net>
Sent: Thursday, June 30, 2005 8:22 AM
Subject: Re: [R-390] BFO question


> It is possible that the BFO knob could have been turned multiple times 
> either way putting the BFO frequency way off.  It could be oscillating OK 
> but be way off frequency.
>
> ----- Original Message ----- 
> From: "Kenneth" <crips01 at msn.com>
> To: <r-390 at mailman.qth.net>
> Sent: Wednesday, June 29, 2005 4:51 PM
> Subject: [R-390] BFO question
>
>
>>I am going to get the BFO working on My R390A, once and for all. I have 
>>the
>> Y2K manual, of course, but I need a little advice. Here is what I have; 
>> the
>> BFO does not work, there is no calibration tone in the R390's audio but I
>> can hear it from the SBA-1 side band adapter, I can see a calibration
>> carrier in the signal strength meter on the R390.  The tubes on the IF/RF
>> module test good, if I can trust my tube tester that is.  Where do I 
>> start
>> on this to figure out what is going on. I have replaced the two 
>> questionable
>> caps in this module.  The radio works fine otherwise.  I have not been 
>> too
>> motivated to repair the BFO because of the side band adapter.
>>
>>                             Ken
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>
>
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