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From: "Mike Dennison" <mike.dennison@ntlworld.com>
To: rsgb_lf_group@blacksheep.org
Date: Tue, 16 May 2006 13:13:32 +0100
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Subject: Re: LF: DATONG VLF converter
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Status: O

You will need 9 volts. It covers DC to 500kHz with an IF of 28 - 
28.5MHz. It is very sensitive and likely to overload, but a simple 
resistive attenuator (100 ohm potentiometer across the antenna 
socket!) will fix this with a big antenna. Frequency stability is OK 
for CW and may be OK for QRSS3, but not is certainly not good enough 
for slower modes. On mine, I cannot get the crystal to tune to 
exactly 28MHz and have to offset the receiver by about 1kHz.

This is a very useful piece of equipment to get anyone with an HF 
receiver on the air on 136kHz. BEWARE - when using a transceiver as 
an IF, make sure the Tx cannot be switched on!!

Mike, G3XDV
===========

> I've found an old DATONG VLF converter without manual. Does somebody
> know the supply voltage and frequency range?
> 73 Jo, DK2PH