I believe that at Station X (aka Bletchley Park) the monitoring positions used
large numbers of HROs and AR88s, fed from a common aerial farm. Some kind of
preamp was needed and I have been told they used several 807s.
I also came across an Old Timer who used a single 807 on CW, running 110 W
input. He said "It's very simple. You keep the volts up, the current down and
be careful of the screen dissipation. Anyway, I have a large box of these
which I got government surplus".
73
John F5VLF
*********** REPLY SEPARATOR ***********
On 12/02/2007 at 20:53 Alan Melia wrote:
>No No Dave lotsa volts and lotsa milliamps, Nuvistors a trifle fragile
>compared with 807s..... I believe Brian CT1DRP built one or used one for an
>e-probe. Feeding can be a problem, they do have a bite !!
>
>Alan
>
>----- Original Message -----
>From: Dave G3WCB <[email protected]>
>To: <[email protected]>
>Sent: 12 February 2007 20:33
>Subject: RE: LF: Re: Re: TIL Grabber back online...
>
>
>> 807 = vacuum tube = WW2 transmitting Beam tetrode. You could try a
>Nuvistor
>> ;-)
>>
>> 73, Dave G3WCB IO91RM
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