11 Set stuff

[David Dunlop]

Any radioactivity present would not be worth worrying about, Grant, and plain glass and plastic have zero containment capability in any event. To act as a radiation shield, you need leaded glass, but I am not sure what percent lead is required. Common crystal glass is around 22 to 24 % as I recall.

David

[Mike K]

I just received a C tuner from Kevin, I am surprised at how different it is to the Aust. made version, quite a bit smaller it is . Yes same problem, the glass has gone a yellowy faded shade , cannot read the meter .

[cletrac (RIP)]

Mike, just take out the four screws on the shield then turn it over and take out the next 4 screws and it all comes apart. Pull the two layers of glass apart and remove the plastic. Mine didn't seem to have any kind of adhesive on it, A bit of Windex and all is well!
What manufacturing company would R.G.D. be?

[Mike K]

OK . I see the 4 screws and the meter cover .

I do have a spare meter - same as the one in the C unit .

[Mike K]

The screws are BA thread - I replaced the 8 rusty screws that hold the chassis in the box .

The 4 BA C/sunk screws holding the meter cover on were really stuck, some patience needed .

The meter face is now visible ! I have a left over bit of crumpled 1940 plastic lens.

BTW I don't know who thought up the theory of the C tuner . In actual field use , I've heard that all it did was absorb some of the RF energy that was meant to go up the antenna

[Chris Suslowicz]

Originally Posted by cletrac

What manufacturing company would R.G.D. be?

Radio Gramophone Development Co.

http://www.gracesguide.co.uk/Radio_G...Development_Co

http://www.rgd.org.uk/index.html

Chris.

[kevin powles]

Originally Posted by David Dunlop

Any radioactivity present would not be worth worrying about, Grant, and plain glass and plastic have zero containment capability in any event. To act as a radiation shield, you need leaded glass, but I am not sure what percent lead is required. Common crystal glass is around 22 to 24 % as I recall.

David

Gents be carful with playing around with the meter, Radon paint may have been used which is Alpha emitting, Which is shielded by glass, plastic or even paper. You do not want to ingest alpha as it is harmful inside the body, your outer layer of your skin shields it too. as long as the painted dial is intact and the paints not coming off it will be ok. A quick removal of the deteriorated plastic does not constitute a hazard in my opinion. I have another four of these units available if your wireless mates need any.

kevin.

[Chris Suslowicz]

I don't think I've ever encountered a plug-in meter with a luminous face, they've all been standard black paint on a white background. The 'three part glass' in the meter protective cover is almost certainly a piece of laminated glass that has delaminated with age. The outer sheets of glass are for scratch resistance and the inner plastic/adhesive layer is to prevent splintering if it gets broken. (Glass either side because you won't know which way it gets put in.)

Meters with plastic (plexiglas/perspex or celluloid) lenses were a later (cheaper) approach, and they discolour and distort (celluloid) or suffer from crazing (plexiglas).

The meter protector is to keep dirt and damp out of the equipment while still allowing you to change the meter if it fails - and I think they issued spare meters (and designed them to be plug-in) for that reason. (It also allows them to be tested easily during overhaul, without dismantling the equipment)

Chris.

[Mrs Vampire]

Mia culpa Mia Culpa Mia maxima culpa

I was asked for a return copy this by someone on this thread who so generously posted it to me more than a year back .

In the great hurly burly of life the reminder system and my feeble memory had pushed it to the outer limits.

I will post a copy of it to anyone who e mails me at ginavampire@bigpond.com

My deepest apologies and regrets fort not attending to this an eon ago .

[kevin powles]

Originally Posted by Gina Vampire

Mia culpa Mia Culpa Mia maxima culpa

I was asked for a return copy this by someone on this thread who so generously posted it to me more than a year back .

In the great hurly burly of life the reminder system and my feeble memory had pushed it to the outer limits.

I will post a copy of it to anyone who e mails me at ginavampire@bigpond.com

My deepest apologies and regrets fort not attending to this an eon ago .

Hi, that's a drawing I did, it's the gasket, pax board and pins for the 11 set plugs.

[Mrs Vampire]

Hi Kevin
you very kindly sent me a plug and the drawing . I am sure you asked me to e mail back a copy....

I very negligently forgot ...and for that my apologies.

[kevin powles]

Originally Posted by Gina Vampire

Hi Kevin
you very kindly sent me a plug and the drawing . I am sure you asked me to e mail back a copy....

I very negligently forgot ...and for that my apologies.

No worries, better late than never.


Kevin