Two 14" picture monitors.

[Geordie McBoyne]

Arrived yesterday, two rather dirty and bashed up monitors, one is a Marconi and the really rusty one is an unknown make to me.
If unserviceable, there's always two 14" rectangular electrostatic gun CRTs for other restoration projects.  

Geordie McBoyne.

[ppppenguin]

Paul Marshall might well be interested in the Marconi monitor. He has an extensive collection of historic Marconi broadcast kit.

[Geordie McBoyne]

Hi Jeffery,
The Marconi monitor is in better physical condition than the other one but there is some evidence of a few components have been removed, the B12A tube socket for example.
The monitor with the rusty cabinet is an all transistor model made in the USA by Conrac in California. The CRT is a Mullard AW36-48. The line output transistor is a BU106, European devices in an American product.
This monitor was made for 250volt 50 or 60Hz mains supplies.

Geordie McBoyne.

[Murphyv310]

Time to get the crt tester and check the emission.

[beamcurrent]

Hello Geordie

I was watching those two with interest, but did not bid.  I wondered if the smaller one was a Conrac.

I do have one of the Marconi ones, alas mine has faulty scan coils and you will see they are not standard ones!, the tube is an original PTM58 Marconi numbered one. I don't have a circuit for my monitor.

Attached is an extract from the Marconi catalogue that may be of interest to you.    

Regards  Brian