[R-390] SERIAL # 163

[rbethman]

Rich,

I wouldn't be too quick about betting the farm.

I've had several R-390As, and EVERY single one of them has followed the 
circuit.  None have EVER had a relay for the BFO,

I have NOT heard of such on the group either.  Most of the folks are 
VERY fastidious about their work on these.  It is a "pride" sort of 
thing.  It is extremely rare that a mod gets done without it "looking" 
like original.

Bob - N0DGN

RICHARD MC KINNEY wrote:
> Bob
>  I would bet the farm this is factory.  Also the BFO circuit is much 
> different.
> ----- Original Message ----- From: "rbethman" <rbethman at comcast.net>
> To: "RICHARD MC KINNEY" <pmcknney at bellsouth.net>; "R-390-List" 
> <R-390 at mailman.qth.net>
> Sent: Thursday, March 26, 2009 6:27 PM
> Subject: Re: [R-390] SERIAL # 163
>
>
>> Rich,
>>
>> My '51 Collins is an earlier one than yours.  That relay "may" look
>> factory, but I have YET to see a relay in an IF deck that controls the
>> power to the BFO.
>>
>> Group?
>>
>> Bob - N0DGN
>>
>> RICHARD MC KINNEY wrote:
>>> Bob
>>>  Thanks for the quick responce.  I should have said it is a Collins
>>> serial 163 order # 375-p-54
>>>
>>> ----- Original Message ----- From: "rbethman" <rbethman at comcast.net>
>>> To: "RICHARD MC KINNEY" <pmcknney at bellsouth.net>
>>> Cc: <r-390 at mailman.qth.net>
>>> Sent: Thursday, March 26, 2009 6:10 PM
>>> Subject: Re: [R-390] SERIAL # 163
>>>
>>>
>>>> Rich,
>>>>
>>>> Whom is the manufacturer?  Just a serial number doesn't help with whom
>>>> made it/
>>>>
>>>> The collective wisdom is here amongst us, but I had a '67 EAC s/n 131
>>>>
>>>> I also have a '51 Collins in the 3XX region.
>>>>
>>>> Perhaps some pix of the IF section.  Holler if you need a place to 
>>>> post
>>>> them.  I or others would be willing to put them up and provide you the
>>>> link to post.
>>>>
>>>> Bob - N0DGN
>>>>
>>>> RICHARD MC KINNEY wrote:
>>>>> DE WB4VFN Rich
>>>>>   I have a R390a Serial @ 163.  Problem is turning on the BFO looses
>>>>> all output.  Rx is ok all bands with BFO off.  I have a manual for
>>>>> thr R390a but I guess mine is an earlier model.  The BFO in mine is
>>>>> nothing like the schematic.  Mine has a small relay that is switched
>>>>> on by the BFO switch.  I don't think this is any kind of mod as it
>>>>> looks factory wired. The BFO circuit is also very different then the
>>>>> schematic I have.   The rig was given to me and I would love to see
>>>>> it work again properly.  So far I've had to change the 17 mc crystal
>>>>> and a few tubes to hear it work again.  Anyone have a schematic with
>>>>> a relay in the BFO switch?  73 Rich
>>>>>
>>>>
>>>> -- 
>>>> Bob - NØDGN
>>>>
>>>
>>>
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>>
>> -- 
>> Bob - NØDGN
>>
>
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-- 
Bob - NØDGN