Re: {Collins} Mic Gain
- To: jsternmd@xxxxxxx, ab8bw1@xxxxxxxxxxxxx, collins@xxxxxxxxxxxxx, kc9cdt@xxxxxxx
- Subject: Re: {Collins} Mic Gain
- From: Glen Zook <gzook@xxxxxxxxx>
- Date: Sun, 26 Jun 2011 20:05:28 -0700 (PDT)
- Delivered-to: collins@xxxxxxxxxxxxx
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One thing that affects the tone level, which is used for tune up and for CW in the KWM-2 series and the 32S-1/32S-2, is the 6U8 tone oscillator. Various tubes have substantially different output and the 6U8 is not known for really long life. Unfortunately, although a 6EA8 can usually replace the 6U8, in this particular circuit a 6EA8 often does not work well, if at all. Why? I have no idea!
Glen, K9STH
Website: http://k9sth.com
--- On Sun, 6/26/11, kc9cdt@xxxxxxx <kc9cdt@xxxxxxx> wrote:
If...upon trying to the field alignment it does not go well...then maintenance & lab alignment are called for. If the trimmers do not respond correctly, the ones that do not will need maintenance or replacement.
I just did full maintnence & lab alignment to a friends KWM-2 and now it is fantastic...just like out of the box. He said it works like a brand new one and the way he remmebers it when his Father bought it new.
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