[Elecraft] XV50 question

[Jim KO5V]

Thanks Don,

I'll test it as-is. The 2d connectors are all contacting clean metal, so it should be OK - at least in terms of noise.

73, Jim KO5V 


-----Original Message-----
>From: Don Wilhelm <donwilh at embarqmail.com>
>Sent: Dec 23, 2018 12:09 PM
>To: Jim KO5V <ko5v at earthlink.net>, Elecraft List <elecraft at mailman.qth.net>
>Subject: Re: [Elecraft] XV50 question
>
>Jim,
>
>I would have to ask the XV series designer, but he specified that those 
>transistors be mounted above the board.  Likely for LO stability, and 
>better separation from the ground plane on the board.
>
>I believe it should work mounted the same way in the XV50.  If you find 
>LO instability, then mount it down on the board.
>
>If you scraped the paint from all panels where they contact the 2D 
>connectors and the output jack, there should be little noise conducted 
>to the inside of the transverter.
>
>73,
>Don W3FPR
>
>On 12/23/2018 1:30 PM, Jim KO5V wrote:
>> First, Happy Holidays to everyone, and thanks for all of the helpful advice over the past few months.
>> 
>> 
>> Here's my question: in the XV144 and XV222 sections of the assembly manual, Q1 is installed with long leads, standing above the board. The XV50 instructions do not mention this. Should I re-install it in the usual way (close to the board), or leave it. Also, can anyone tell me the reason for elevating it in the other XVs? That seems like a good way to pick up noise to me, but a lot of you have forgotten more than I know about this stuff...