[Boatanchors] RME 69 Crystal Filter and Cc/C adjust

[Al Klase]

Glen,

That was the official story.  The real reason is that when you do 
something in small numbers, and in fits and starts, the cost of having 
the panels silk screened is prohibitive.  If you can afford to inventory 
1000 pieces, things are different.

Al

On 4/14/2013 1:27 PM, Glen Zook wrote:
> The supposed reason for there being no labeling on the front panel is 
> because RME believed that any operator "worth their salt" didn't need 
> labels to tell which control did what!
> Glen, K9STH
>
> Website: http://k9sth.com
> ------------------------------------------------------------------------
> *From:* Al Klase <ark at ar88.net>
> *To:* BOATANCHORS at MAILMAN.QTH.NET
> *Sent:* Sunday, April 14, 2013 12:14 PM
> *Subject:* Re: [Boatanchors] RME 69 Crystal Filter and Cc/C adjust
>
> Hi Bill,
>
> I have my 69 on the bench, and it appears my restoration and alignment
> efforts of the late '90 have held up.
>
> The positions of the Crystal Filter Switch (B) (upper right corner) are,
> left to right, OUT - SERIES - PARALLEL
>
> The Crystal Selectivity (E) variable capacitor, CH, is just below the
> switch.
>
> I'm blessed with an original copy of the documentation, and the switch
> connections are clear, unlike all the third-order scans on the web..
>
> It's a single-pole three position switch, with the common terminal
> connected to the grid of the 6D6.
> In the left-hand position, it shorts out the crystal for full frequency
> response.
> In the middle position it does nothing.  This allows "normanl" crystal
> filter action.
> In the right-hand position it shorts out the "phasing capacitor" CI, the
> trimmer inside the filter can.
>
> Sandy's right, your going to need a crib sheet for the unmarked front 
> panel.
>
> I strongly suggest you replace ALL the paper caps before you attempt
> alignment.  DON'T EVEN TRY TO TUNE JUNK!
>
> I'll try to get this stuff posted to my website soon.
> http://www.skywaves.ar88.net/commrx/RME/RME.html
>

-- 
Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/