[R-390] R-390 Question

[eldim at att.net]

Hello David & Crew
6K Ohms  most likely will not have any adverse affect of the audio level.
I don't recall if the volume control is a log-taper or a Linear potentiometer.
Whichever type it is, then you must replace it with the same type.
To determine which type pot this is, you simply adjust the pot to1/2 way, then measure the resistance with an Ohmmeter.  It should be around half the total for a Linear Resistor.  A Log Taper will read a very low value resistance value at mid scale.  on a 5 K Pot-perhaps 500 Ohms at mid point.
73,
Glen Galati, KA7BOJ
Tacoma, WA
eldim at att.net

-------------- Original message from "David C. Hallam" <dhallam at rapidsys.com>: -------------- 


> As you were! I was looking at the IF gain pot rather than the RF gain pot 
> when I said 25K. RF gain pot is called out as 5K. 
> 
> David 
> KC2JD 
> 
> -----Original Message----- 
> From: Roy Morgan [mailto:roy.morgan at nist.gov] 
> Sent: Tuesday, September 05, 2006 3:19 PM 
> To: dhallam at rapidsys.com 
> Subject: RE: [R-390] R-390 Question 
> 
> 
> At 02:47 PM 9/5/2006, you wrote: 
> >... 
> >RF gain pot. The schematic calls out 25K ohm and I just measured mine at 
> >6K ohm. 
> 
> David, 
> 
> The Y2K manual shows the RF gain pot to be 5K. 
> 
> Roy 
> 
> 
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing 
> 13033 Downey Mill Road 
> Lovettsville, VA 20180 
> Phone 540-822-5911 
> Cell 301-928-7794 
> Work: Voice: 301-975-3254, Fax: 301-975-6097 
> roy.morgan at nist.gov -- 
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