[Hallicrafters] SX-117 slave mode

[Duane Fischer, W8DBF]

Jim, Skip (and all)

We had several Hallicrafters SX-117 and HT-44 combinations on the air last 
Sunday during the HHI Sunday 20 meter Net. FYI: 1:15  - 3:00 PM EST, 1815 - 
2000 UTC, on/about 14.293 MHZ usb +/- Generally between 14.292 and 14.2925

I remember about five years ago on a Saturday when five check ins were "ALL" 
using the SR-2000! I sat back and listened to something I did not think that 
I would ever hear again, five SR-2000's in a five way QSO! Fantastic!


Duane Fischer, W8DBF/WPE8CXO
dfischer at usol.com
HHI: Halligan's Hallicrafters International
http://www.w9wze.net
HHRP: Historic Halligan Radio Project
hhrp.w9wze.net

----- Original Message ----- 
From: "james.liles" <james.liles at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Thursday, January 03, 2008 12:00 PM
Subject: [Hallicrafters] SX-117 slave mode


> Hi Skip,
> First verify that the radio is wired to the "E" suffix schematic.  Then 
> use service bulletin 1964-4 June 1, 1964 to make the cable that connects 
> the SX-117 and HT-44.  The length and type are critical!!!  The capacitor 
> that replaces the tab cap is 1.5 - 9 PF NPO temp comp.  Anything close 
> will work but must be NPO.  If you need the service bulletin, I can scan 
> it and send it to you.
>
> I overlooked the serial # ending in 1.  I believe that is a run2 or B 
> suffix radio.  The B to C changes were significant and were included in 
> the C-169 change letter.  Improves the radio significantly.  Note, the AVC 
> tap change on the C level radio causes it to respond to signals that are 
> out of the final IF band pass --- also causes the S-Meter to see things 
> that are not yet audible.  Kindest regards Jim K9AXN
>
>
>
> Original message:
>
> Message: 1
> Date: Wed, 2 Jan 2008 14:12:59 -0800
> From: Waldo Magnuson <magnuson at mac.com>
> Subject: [Hallicrafters] SX-117 modification for use with HT-44
> To: hallicrafters at mailman.qth.net
> Cc: Waldo Magnuson <magnuson at mac.com>
> Message-ID: <E05FB502-B97F-11DC-B8F3-00039315EF26 at mac.com>
> Content-Type: text/plain; charset=US-ASCII; format=flowed
>
>    I have been trying to solve the problem I have with frequency
> stability when using the HT-44 in slaved mode with the SX-117.  The
> HT-44 manual has "SX-117 Notes" on page 14 of the manual.  Note 2
> states that on sets below s/n 117004 (mine is 117001) the replacement
> of the brass compression trimmer by a silver ceramic type capacitor
> should help with VFO drift or long-term calibration.
>    My question is - has anyone made this modification and what value
> ceramic capacitor was used?  Thanks.
> 73,  Skip W7WGM
>
> ______________________________________________________________
>
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 
> 269.17.13/1207 - Release Date: 1/2/2008 11:29 AM
>
>