[Elecraft] K1 VFO frequency range change

[Sandy W5TVW]

Irecently changed my K1's VFO range.  Now I can reach 7150 on 40 meters.
On 80 (with my 2 band 160/80 meter RF board) I get up to around 3673.
I also tried the 1 mf cap in AGC circuit with no results.

73,
Sandy W5TVW
----- Original Message ----- 
From: "Rick Dettinger" <k7mw at cmc.net>
To: <elecraft at mailman.qth.net>
Sent: Wednesday, April 05, 2006 2:53 PM
Subject: [Elecraft] K1 VFO frequency range change


| I changed the VFO frequency range capacitor to 120 pf and now have a 178 khz
| tuning range.  Since I only need 125 khz to reach the SKCC frequency  of
| 7120 khz, I may try a 100 pf capacitor.  I would like to know what types of
| capacitors will work will here.  The 68 pf  capacitor is a disc ceramic and
| the 120 pf  capacitor is a polystyrene type.  To make this change, I not
| only needed to change the VFO capacitor, but also the 30m xtal and futz
| around with the turn spacing on the VFO coil to get the proper VFO range.  I
| do not find the 18 khz per revolution tuning rate to be difficult but it is
| my nature to keep fussing.      73 - Rick - K7MW
| ----- Original Message -----
| From: "Rick Dettinger" <k7mw at cmc.net>
| To: <elecraft at mailman.qth.net>
| Sent: Monday, April 03, 2006 10:12 PM
| Subject: [Elecraft] K1 AGC time constant
| 
| 
| > I changed C31 on the RF board to 1uf  but it still seems very slow.  When
| I
| > remove an S9 siginal  (50uv) it takes about 15 seconds for the S meter to
| > decay to one bar.  I used a non polorized electrolitic cap as that is what
| > they had at RS.  It is physically larger than the original cap but there
| is
| > plenty of room.  I am not sure what a non polorized electrolitic capacitor
| > is but there are no polarity marks,  which I haven't seen before.  Should
| I
| > try a smaller value for C31?         Thanks - Rick - K7MW
| >
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