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Re: LF: Low power Tx

To: [email protected], <rsgb_lf_g[email protected]>
Subject: Re: LF: Low power Tx
From: [email protected] (Warren K2ORS/WD2XGJ)
Date: Sun, 19 Mar 2006 18:41:05 +0000
Cc: "Walter Blanchard" <[email protected]>
Delivered-to: [email protected]
Reply-to: [email protected]
Sender: [email protected]
Hi Walter,
    That's excellent news. Is the P.A. linear or a switching design? Do you 
know where I might get one?

Thanks & Vy 73 Warren K2ORS/WD2XGJ
FN42hi
http://www.w4dex.com/wd2xgj.htm

 -------------- Original message ----------------------
From: "Walter Blanchard" <[email protected]>
> I found a Decca Aerial Testing Signal Generator Type 1615 at a junk sale a 
> few 
> months ago. It's basically a xtal osc/driver/PA transmitter for LF (Decca 
> freqs 
> 70-127 kHz). Very easily converted for 136 because the o/p transformer is 
> wide-band enough to cover 136 and needs no modifications. Plug about 100 mW 
> 136 
> kHz RF into a xtal socket and it will give out 20-25w RF into 72 ohms (PA is 
> 2x807's). My old Marconi 2019 SG was quite adequate as signal source. Quite a 
> lot were made so there may be a few more appearing round the junk sales and 
> if 
> you see one it's well worth �5 of anyone's money!
> 
> Walter G3JKV.
> 



--- Begin Message ---
To: <[email protected]>
Subject: LF: Low power Tx
From: "Walter Blanchard" <[email protected]>
Date: Sun, 19 Mar 2006 18:12:54 +0000
I found a Decca Aerial Testing Signal Generator Type 1615 at a junk sale a few months ago. It's basically a xtal osc/driver/PA transmitter for LF (Decca freqs 70-127 kHz). Very easily converted for 136 because the o/p transformer is wide-band enough to cover 136 and needs no modifications. Plug about 100 mW 136 kHz RF into a xtal socket and it will give out 20-25w RF into 72 ohms (PA is 2x807's). My old Marconi 2019 SG was quite adequate as signal source. Quite a lot were made so there may be a few more appearing round the junk sales and if you see one it's well worth £5 of anyone's money!
 
Walter G3JKV.
 

--- End Message ---
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