Message-ID: <2001021016310468199@zetnet.co.uk>
Date: Sat, 10 Feb 2001 16:31:04 GMT
To: rsgb_lf_group@blacksheep.org
From: "Peter Dodd" <g3ldo@zetnet.co.uk>
Subject: Re: LF: G3LDO & M0BMU Copied Plymouth, MA
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Hello Jon

> Copied what appears to be both G3LDO and M0BMU at 0424 today.  BMU's signal
> was there for quite a while and is ID'ed by only partial character.  LDO
> came out of no where and I have a lean screen shot of G 3 L then a partial
> D which actually looks like an N.  It looked like LDO shut the transmitter
> off before the ID cycle finished. 

Thanks for the screen shot. I found it very helpfull. It is amazing 
what you can hear (see) with that little antenna.

I got up at 0400 and switched on the transmitter. After making sure 
that it was transmitting correctly I went back to bed.
When I got up at 0700 I found that the transmitter was not working. I 
checked the 70v PSU and, judging by its temperature, the transmitter 
had been off for a while.

I had the new DDS exciter on for the first time (in a new diecast box 
with reverse supply protect etc). This project was only just 
completed in time to go on the air.  This unit runs off a seperate 
chargable battery. What I didn't realise was the DDS takes about 3 
times as much current as the original crystal mixer exciter. The 
transmitter had been on from 2100 until 0030 and then from 0400 until 
the battery died. 

I will try again tonight from 2300 until bed time and then from 0400.

I will try to give a more exact frequency when I have calibrated the DDS unit.

The battery is well and truly charged!


-- 
Regards, Peter, G3LDO

<g3ldo@zetnet.co.uk>