[UK-CONTEST] How much is this worth ?

[Paul_group]

On 18/06/2010 07:41, Steve Thompson wrote:
>>>>> On 14/06/2010 at 23:25, in message<4C16AC6E.8090401 at gb3hp.co.uk>, Will M0GYZ
>> <m0gyz at gb3hp.co.uk>  wrote:
>>
>>> 2. A Dressler D-200 S 2M Linear Amp with 4CX350A Value


>
> You can squeeze more than that out of them, but anything over
> 300ish Watts isn't adding to your signal on channel, it's wiping
> out your neighbours with splatter.
>
> I've worked on several over the years. They are potentially deadly
> to both operator and rig. The earthing is iffy and mains is
> carried on long bare pcb tracks with insufficient gaps to low
> voltage electronics. Large air inlet holes (with no mesh on the
> ones I've seen) allow debris and insects in, and the inevitable
> does happen.
>
> Value - £30 for the valve and base, £10 for the transformer, £5
> for the rest as scrap.
>

They certainly were "of a time", along with the NAG144XL. They were 
responsible for a lot of struggle and strife during VHF contests back in 
the seventies and eighties.

But then in their own way they also contributed to the learning of how 
to do it right. Articles by John FRX and things like the SEK psu control 
boards had us scrambling for the soldering iron to make these POS amps 
half decent.

I don't think anyone ever made one "safe" ;-)



-- 
73 de Paul GW8IZR IO73TI
http://www.gw8izr.com