[R-390] Product detector

[Spence Barton]

Larry, Thanks for posting that link. I'm interested in 
building one. Would this product detector need modification 
to work with a 390 vs 390A?

Spence

On 9/28/2017 4:24 PM, Radio AI2Q wrote:
> Here's mine, Larry.
> 
> http://ai2q.org/Prod_det/detector.htm
> 
> 
> Vy 73, AI2Q, Alex
> 
> 
> 
> ----- Original Message ----- From: "Larry H" <dinlarh at att.net>
> To: <r-390 at mailman.qth.net>
> Sent: Thursday, September 28, 2017 4:08 PM
> Subject: Re: [R-390] R-390a modified IF sub-chassis
> 
> 
>> This mod does require a panel mod.  The original BFO 
>> switch needs to be changed to a 2 pole 2 position in order 
>> to switch the audio.  This looks pretty clear to me on the 
>> schematic Gary supplied.  This is the same technique used 
>> by Lee's original mod.  So, this IF unit will not work in 
>> another R-390A with out the associated wiring and switch 
>> change.
>>
>> Regards, Larry
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