[ARC5] OT? bc-348 bfo question

[Ronnie Hull]

Modify a bc348? BLASPHEME!

Sent from Ronnie's IPhone

On Sep 13, 2013, at 10:46 AM, Joe Connor <joeconnor53 at yahoo.com> wrote:

> Fernando:
> 
>     I can't specifically answer your question but I suspect this is the reason a lot of people modified
> BC-348s to separate the RF gain from the AF gain. The Surplus Radio Conversion Manual by Evenson and Beach explains how to do this. If you run a google search, you can find it and read the appropriate section.
> 
>                                      Joe Connor
> 
> 
> 
>> ________________________________
>> From: Fernando - LU2DFM <lu2dfm at gmail.com>
>> To: arc5 at mailman.qth.net 
>> Sent: Friday, September 13, 2013 11:28 AM
>> Subject: [ARC5] OT? bc-348 bfo question
>> 
>> 
>> 
>> Sorry if this is OT here.
>> 
>> I'm repairing and aligning a BC-348 (E, M or P variant, don't know
>> exactly which).
>> 
>> The set is going on very well on AM so far, however the BFO injection
>> level seems to be too low for SSB on strong signals. It's possible to
>> get SSB on the headphones with MVC and _very_ low RF gain.
>> 
>> All voltages and resistors values are ok around that stage with and
>> without BFO on. The xtal filter is ok too (bandwith with xtal on is about
>> 1-2 kc).
>> 
>> The 2nd IF/CW osc. is the 6B8/VT93.
>> 
>> Anyone knows what the level of the BFO is supposed to be? 
>> 
>> Thanks.
>> 
>> -- 
>> 73 de Fer, LU2DFM
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