[AMRadio] EF Johnson Messenger II on 10 Mtrs - Project


WØTDH w0tdh at hughes.net
Thu Aug 20 15:33:46 EDT 2009


Tnx Bob


----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Thursday, August 20, 2009 3:30 PM
Subject: Re: [AMRadio] EF Johnson Messenger II on 10 Mtrs - Project


Remember that attachments are stripped!

No one got the schematic.

Bob - N0DGN

WØTDH wrote:
> EF Johnson Messenger II on 10 Mtrs - Project
> Some progress. Xmtr now puts out about 6 watts on 29.100kc. Tweaked tank & 
> by-passed R-48.
> Dave - WB1EAD sent me a xtal for 29.100kc  ( xmit ).
>
> Rcvr another story. Still fiddling with the rcvr VFO. ( Continuous rcve 
> function )
> Schematic attached if anyone has an idea of how to bring rcve up to 29.000 
> / 29.100kc area.
>
> Dale - W4OP states xtals are third harmonic. Rcve xtals are less 455kc. 
> Will order a few from Brian.
>
> Using xtals on rcve, should just be a matter of tweaking..... I hope.
> Still would like to use the continuous rcve function though.
> L-113 ( shown L-13 in schematic ), does adjust as does the trimmer C-111 
> attached to it, but not nearly enough.
> Add / subtract capacitance?
> There are two small disk caps with one side of their leads twisted 
> together ( gimmic? ) in the VFO area.
>
> Any help would great.
> 73,
> Tom
> Thomas F Fischel - WØTDH
> 8274 Cullowhee Mountain Road
> Cullowhee, NC  28723
>

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