[Elecraft] Re: WA2DGD: RE: New xtals

Tue Nov 5 13:29:00 2002

Hi Gary,

Thanks for the reply. Keep in mind this is a fully functioning K2 with the
old xtals.
I removed the SSB module and shorted the appropriate pins. Now the CW
filters work great, no attenuation and a great shape. CW and CW rev look and
sound excellent. I was easily able to run spectrogram.
I put the SSB module back in and.....everything works great...go figure.
Maybe I didn't have the SSB module seated well.  Thanks for all the help.
73
Larry
WA2DGD
K2 #1672
ARCI QRP #11215
NJ-QRP# 395

----- Original Message -----
From: "Gary Surrency" <[email protected]>
To: "'Larry - WA2DGD'" <[email protected]>
Cc: "CSinfo (E-mail)" <[email protected]>
Sent: Tuesday, November 05, 2002 12:43 PM
Subject: WA2DGD: RE: New xtals

> What filter is FL2-FL4 set to? These are often the CW variable filter on
the
> RF PCB, and not the OP1 fixed filter on the SSB option.
>
> If this is the case, then you may have a problem with the CW variable
> filter, or the PIN diode switching on the SSB option that selects either
> filter.
>
> It could also be just a poor alignment on the CW variable filter too. When
> CAL FIL BFO settings are correct, there is only a 3-6dB loss at the
narrower
> CW filter bandwidths.
>
> Be sure the T1, T2, RFC1, RFC2 toroids on the KSB2 option are correctly
> built and installed, and there are no poorly tinned toroid leads or short
> circuits in those areas. A close inspection of the SSB option should show
if
> there is a problem.
>
> Place jumper wires in the 3 pin connectors, and a .001uF cap across P1
pins
> 7 & 12. See if the rig then works normally, and if you can get CAL FIL
done
> well for the CW filter.
>
> --
> 73, Gary AB7MY
> =========
> [email protected]
> Elecraft Technical Support
>
> -----Original Message-----
> From: Larry - WA2DGD [mailto:[email protected]]
> Sent: Tuesday, November 05, 2002 9:44 AM
> To: Elecraft Reflector; Elecraft Support
> Subject: New xtals
>
>
> Hello all,
>
> I just finished replacing xtals X5 - X11 and the 7 xtals on the ssb board.
> I'm trying to use Spectrogram and the noise generator to realign the
filters
> (cal fil). I'm finding that FL2 and FL3 are down at least 20db and FL4 is
> down over 30db compared to FL1. I get similar results on SSB. Am I
> forgetting to do something else?
> I've rechecked the xtals under magnification and all connections are fine,
> no shorts, etc. I grounded the xtals at the bottom on both sides (just
like
> the original xtals).
> What's happening here? Your help will be greatly appreciated.
> 73
> Larry
> WA2DGD
> K2 #1672
> ARCI QRP #11215
> NJ-QRP# 395
>
>
> ---
> Incoming mail is certified Virus Free.
> Checked by AVG anti-virus system (http://www.grisoft.com).
> Version: 6.0.410 / Virus Database: 231 - Release Date: 10/31/2002
>