fv1609

Yes Chris it was quite hairy stuff. It was actually 1932, quite a complex research paper trying to combat instability in transmitters operating between, 1,000 and 20,000 kc/s (No disrespect to Herr Hertz but I like the original terminology ie it means just what it says)

Nope it was the location. There were some pictures with the last MO during the FVRDE trials.

The rods are on bearings (quite why is not made clear) There must have been high current the power unit gave 20 kW. The structure so designed so it detuned by minimal amounts at changes of 40 deg C that were described as "Beyond audibility" Well remembered but this was not the underwater system this was for battleships of a later period. So this is connected to that mystery object and the last one.

Yes well done Chris you've got it as far as anyone could. It is actually a crucial part of a bridge circuit to try to tame instability in high power HF transmitters. Can anyone guess the appx year? What is the connection with the last mystery object?

Nope not really but there are bearings but I can see no reason for it to rotate nor can I see how it would rotate and I have the 26 page description in front of me! and no it wasn't a tin opener.

No sacrifices involved here

Yes peeping often catches out one or two

Ingenious thought but nope.

I think I used "very clever" Tony, not always the same thing :-D

Nope I think you have been "had":clap:

Tony that wasn't a suggestion I would have anticipated, I think need rethink that one :-D

Nope but water is sort of the connection with the previous MO

Nope not a transformer (good to see you back MO hunting again Lee)

Nope not a rectifier

Yes if you've got rather fat legs I suppose :-D

There is actually a connection with previous object although it would take a very clever person to work that out :-D

Ok Iain thank you for that. What saved my bacon was coming across the UHB with circuit diagram just as I was going to press as it were. Although I now have few other things to add in readiness for the next update! A slight puzzle is this. Mk 2 & earlier Gen Panels have a feed from the ignition to activate the field isolating relay, but it also carried the feed through to the generator connector, although the generator itself has no need for an ignition feed. Mk 3 Panels no longer needed a field isolating relay, but none the less this ignition feed F PL2 to G SK1 still exists & has a bypass capacitor. In the Rover harness panel to generator there is no feed G, but I notice it is depicted in the AEC harness. Quite why I don't know as there is nothing there that needs this feed. Looking in an EMER I see a test bench described where a switch to the +ve rail can be operated simulating the ignition feed & it is marked "AXIAL STARTER" So there is some vehicle that has a starter circuit permitted after activating a relay fed from the ignition feed that come out of G. It seems the only two other applications could be Stalwart or BV202. I have a Stalwart UHB but sadly there is no circuit diagram. Perhaps a Stalwart owner can help out?

DZS4A is the distributor, the specific Lucas version is 40753. This is listed on page 13 of the User Handbook AC No. 22228. You are right the description makes no mention of there being no vacuum advance on the screened distributor. But I suppose there is only so much that can be fitted into a handbook. At least you get a few circuit diagrams & a minor amount of technical info. Current handbooks carry little of this, it is mainly about adjusting the seats, heating etc & the inevitable section on how to destroy the vehicle.

No problem Fred. I seem to have DZS4A on my brain at the moment, there were at least a dozen of them. But by no means all of them are suitable for Rovers as I have been plotting the advance curves for each. I just wonder how often people see a DZS4A at a nice price & nice condition then put it in their Rover not realising it may not be an ideal variant for their vehicle.

Fred it is correct that the vacuum hose is only used on the 12v distributor. The 24v distributor (DZS4A) has no vacuum advance, so the outlet is blanked off on the carb.

1962 BAOR markings Table III Page 9 http://www.hmvf.co.uk/pdf/1962.pdf

Yes that's correct

The only possible mod that might make sense is EMER WHEELED VEHICLES D 167 Mod No.34. for the "carriage of Lance MMA". I think MMA is Main Missile Assembly, you can get the idea further down the page here: http://raoc.websitetoolbox.com/post?id=2381331

Yes you are quite correct. This was an early attempt by the Army to emulate the more sophisticated type of barricade pusher used by the RUC. A number of Mk 1 Pigs had these fitted long before the Mk 2 was conceived. You can see these in action in footage of the events involving the Paras in Jan 1972. The design had also evolved into the more familiar 5-bar tubular based barricade pusher that were also fitted to Mk 1 Pigs before the Mk 2 appeared. Some Mk 1 Pigs persisted with pushers of either type & were operational alongside Mk 2 Pigs. These Mk 2 Pig predominantly had the 5-bar remover, although those Pigs that already had the 3-bar type retained these in their up-armoured role. This Pig has all the characteristics of having been up-armoured into a so called Mk 2 Pig.

Are you sure that the registration was really 29 BK 75? It is not uncommon for a vehicle to display an incorrect registration. It's just that I have a photocopy of the Chilwell register in front of me. It seems to have never been converted to Mk 2 status & indeed it was struck in BAOR 25/10/67 None the less nice to see any picture of a Pig, any more pics would be welcome.