TCC (Telegraph Condenser Co.) Mushroom capacitor info?

[Clock]

Has anybody any information or links on old TCC (Telegraph Condenser Co.)
ceramic high voltage capacitors please? Usually referred to as "mushroom "
style. Think Plessey have also made similar capacitors.
Two examples from the junk box are both marked T.T.C. "KO 2944/TS".
However one is marked 250pf whilst the other is marked 120pf. Grey,
tubular, approx 28mm diameter and 100mm long. Breakdown voltage? Suitable
for rf coupling/decoupling? Tempco? Is the KO number a catalogue range or
just an MOD supplier/factory code?

Thanks!

Peter

 

[N. Thornton]

"Clock" <not.clockno spam@virgin.net> wrote in message news:<c548m5$vvs$1@news8.svr.pol.co.uk>...

Has anybody any information or links on old TCC (Telegraph Condenser Co.)
ceramic high voltage capacitors please? Usually referred to as "mushroom "
style.

Suggest crosposting to rec.antiques.radio+phono ng.

Regards, NT

 

[Clock]

Thanks for the suggestion , however the reference to "Telegraph" and
"Condenser" may have been misleading on age and application. TCC had a long
and succesful period long after the "Telegraph" and capacitor had replaced
"Condenser". These capacitors are physically large, around 10kV wkg and
usually found in high power rf amps and matching networks in broadcast/comms
applications. Although they may have been introduced late '50s early '60s
I'm pretty sure that they were still in manufacture into the '70s. Not
quite the wax paper and moulded mica types found in domestic collectables!
There must be a dusty catalogue or set of data sheets on a shelf somewhere!
Cross posting to some of the military collectables or broadcasting ng may be
an idea though
Regards

Peter


"N. Thornton" <bigcat@meeow.co.uk> wrote in message
news:a7076635.0404090913.6a973a9a@posting.google.com...

"Clock" <not.clockno spam@virgin.net> wrote in message
news:<c548m5$vvs$1@news8.svr.pol.co.uk>...
Has anybody any information or links on old TCC (Telegraph Condenser
Co.)
ceramic high voltage capacitors please? Usually referred to as "mushroom
"
style.


Suggest crosposting to rec.antiques.radio+phono ng.

Regards, NT