11 Set stuff

[things_green]

Originally Posted by Mike Kelly

Would a ebonite panel of that size, have enough structural strength ? With all of those holes for the meters and the terminal posts and the rest , a ebonite panel would be rather fragile and prone to cracking . Mike

interesting thread, superb job on your recreation David.

I have a portable charging switchboard Mike, very heavily cutaway for the rheostats & meters.
I don't know if its ebonite, plastic, paxoline or something else?
no sign of cracking since '40, or is that '41.
the facia measures 14 1/2" x 15 1/2".

[Mike K]

Originally Posted by things_green

interesting thread, superb job on your recreation David.

I have a portable charging switchboard Mike, very heavily cutaway for the rheostats & meters.
I don't know if its ebonite, plastic, paxoline or something else?
no sign of cracking since '40, or is that '41.
the facia measures 14 1/2' x 15 1/2".

Brent

hi, that item of yours looks to be in mint cond. It may have been stored and never used .Did you restore it ?

Don't know what it is for ???????????

[things_green]

Originally Posted by Mike Kelly

Brent

hi, that item of yours looks to be in mint cond. It may have been stored and never used .Did you restore it ?

Don't know what it is for ???????????

'portable' charging switchboard. For charging 3 batteries at once...use the rheostats to tune the voltages. I have a 4Kv Coventry Climax genset I'm hoping to use it with. someday ;-)

It was pretty careworn when it arrived.....
I sourced to correct volt meter from my spares (after looking around the planet for 12 months ~doh~). Still requires a 3rd cut-out relay.

[Chris Suslowicz]

Originally Posted by things_green

'portable' charging switchboard. For charging 3 batteries at once...use the rheostats to tune the voltages. I have a 4Kv Coventry Climax genset I'm hoping to use it with. someday ;-)

It was pretty careworn when it arrived.....
I sourced to correct volt meter from my spares (after looking around the planet for 12 months ~doh~). Still requires a 3rd cut-out relay.

Hi Brent,

The front panel will be made of one of the "Tufnol" varieties, and is basically Synthetic Resin Bonded Paper or Fabric. The resin is phenol/formaldehyde and is a thermosetting plastic that is cured by heating with the material in a press. (Basically it's Bakelite with paper or fabric reinforcement and is a good insulator and very strong (in the thickness used for that panel).)

That charging switchboard is meant for a 550 Watt generating set, so your 4KVA one may well cause the magic smoke to escape. They operate by using one of the rheostats to control the generator field current and hence the output voltage produced, and the other three to set the charging current for each of the output circuits - so you can charge different types of batteries simultaneously provided each circuit has the same total voltage rating and all the batteries in a circuit have the same amp hour capacity.

You could ignore the voltage control rheostat and use it with a suitably chunky variable DC supply, say 18 volts at up to 30 amps for charging 12V signals (or other) batteries.

Do you know which accumulator cut-out you are missing? I picked up a couple at a radio rally recently, and while they are fairly heavy, surface mail should not be too expensive, even to the other side of the planet.

Chris.

[things_green]

Originally Posted by Chris Suslowicz

Hi Brent,

Do you know which accumulator cut-out you are missing? I picked up a couple at a radio rally recently, and while they are fairly heavy, surface mail should not be too expensive, even to the other side of the planet.

Chris.

Firstly a thankyou to the Moderators for letting this intrusion to 'No11 Sets' get in the way.

Hi Chris, as always the breadth of your knowledge is astounding.

As I haven't found any docs in the Gnome Archive I'm guessing the missing do-dad is an overcurrent relay/cutoff?

seems logical that its the same as the other two. Z.A.2413.
I am planning on multiple feeds from the Climax genny.... just enough to astound the punters at shows.

cheers.
Brent

back to No. 11 Sets.

[Chris Suslowicz]

Originally Posted by things_green

I'm guessing the missing do-dad is an overcurrent relay/cutoff?

seems logical that its the same as the other two. Z.A.2413.

Hmmm... the two I have also say CAT. No. Z.A.2413 on them, but it's possible that's only the cover because the base of the unit has CUT OUT AUTO No. 6
on the edge of the base next to the cable entry, and CAT No. Z.B.2478 on the opposite end.

I don't think they're an overcurrent relay, more likely the reverse, where they will disconnect the battery from the supply once the charging current falls to a low enough level.

The two tubes lining up with the holes in the cover appear to be for an operator's lamp.

I managed to get the back off one unit, and there's a flat coil (possibly a heating element to protect against frost) inside.

Anyway, they weigh around 590g (or 1lb 4.5 oz for this Imperialist), and I can probably mail you one (or both) if they're suitable and you can't get one locally.

Chris.

[things_green]

Originally Posted by Chris Suslowicz

Hmmm... the two I have also say CAT. No. Z.A.2413 on them, but it's possible that's only the cover because the base of the unit has CUT OUT AUTO No. 6
on the edge of the base next to the cable entry, and CAT No. Z.B.2478 on the opposite end.
Chris.

I removed the centre cut-out today Chris, sounds similar but, unfortunately, no cigar....same element in the base with a mica cover but marked ;
"CUT OUT AUTO No. 7"
"CAT No. ZA 2412"
same for the bottom unit.

I guess its quite possible the top unit was in fact a No. 6, but its speculation and fervent hope
An upgrade unit perhaps?

and yes....the tubes, which I assumed (that mother again) was some sort of vent, is wired!

cheers,
Brent

[Mike K]

Originally Posted by things_green

interesting thread, superb job on your recreation David.

I have a portable charging switchboard Mike, very heavily cutaway for the rheostats & meters.
I don't know if its ebonite, plastic, paxoline or something else?
no sign of cracking since '40, or is that '41.
the facia measures 14 1/2" x 15 1/2".

here is one like yours Brent 9.25 on the movie

https://www.awm.gov.au/collection/F05239/

[things_green]

Originally Posted by Mike Kelly

here is one like yours Brent 9.25 on the movie

https://www.awm.gov.au/collection/F05239/

nicely spotted Mike, thanks ....great to see the kit in use....
love that kick start on the genset!

Brent

[cletrac (RIP)]

It seems odd that the morse key originally had a red and black wire to hook it up when everything else used that drab greenish colour. Here's my key with those wires attached. They're about 2 feet long which is what they call for.
The wave meter had those two spare valves with it. The bigger one is the same as one in the set but the smaller one doesn't have a counterpart unless it's for the vibratory unit that I don't have. It fits in the spare valve case. I'm missing the lid too.
The correction chart has Oct 1, 1940 on one side and March 30, 1943 on the other side. Seeing as how the 11 set was the most modern unit this wave meter was used with, I guess the Brits were still using them for training in 1943.