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Terry Probably it powered a 12V DCCU to float charge a RT320 or RT352 clip-in manpack which would be the most obvious thing to use wing boxes and a side antenna mount in a 12V landrover Regards Iain

Luke Good to hear from you. The SUMB project hasnt gone away but I havent been able to get the time to get it mobile yet - probably end September now Iain

Simon Welcome Here ! I may be in touch later in the year when I have got my SUMB restoration project home as I need some missing or severely rusted bits remanufacturing Regards Iain

Have any of these been in the UK ? I remember seeing something sand coloured that looked rather similar in Witham's yard around late 2011 Iain

There was an official range calculator which is slightly limited to pairs of identical stations but it may well be useful. 30km with EVHF pineapples is realistic in flat country - locally in West Suffolk we have managed 22km 353 to 352 in rolling country with ~ 200 foot hills in the way. I have converted this to Excel - PM me for a copy if interested Iain 73 de G0OZS

As a postscript I think the designers now run Ionocom in Canada - see http://www.ionocom.com/corporate/about

Ian The TRA3755 (described as Javelin compatible) is described at the bottom of http://www.railce.com/cw/casc/racal/panther-h.htm The best info on the main unit I have found is at: http://www.abex.co.uk/esales/radio/racal/javelin/index.htm but they are missing the head unit. There is a 9 pin "ACP Control" interface which is likely to be based on RS-232 anyway so if you knew the messages you could likely program a PC to act as a substitute, anyway. Regards Iain

I was lucky enough to see them together waiting to enter the arena on the Thursday

The connector under the cover is a "C" type which fits the thick coax supplied with the EVHF pineapple broadband antenna for VHF. Iain

My daughter and I dropped in at Foxhall Heath for long enough to take a few photos. More displays and less vehicles this year (I know that's partly my fault for not having one to bring ) Very nice landrover 101 and Beddord MW but I think the Humber 1 Ton is new for this year and a really good specimen. Thanks to all involved in organising the event and all who brought their vehicles Iain

Mike Was yours the rather nice MW at Foxhall today ? Iain

Let me know where you are on site - will you have a 2m/70cm capability or only 6m for talk-in?

Usually the Vintage Operating Group (M0VOG) took a stand for an HF station beside the road and ditch at Beltring - I missed last year so I havent found their place on the new site. Usually G8JAC and his champ with Larkspur sets and Alan G4GEN with a US high power truck station are around somewhere too. I am planning to be there as a visitor on Thursday afternoon so maybe catch up with you - not sure if I will have a radio with me yet Iain 73 de G0OZS

Tony - WS10 is also rather too big - see: http://histru.bournemouth.ac.uk/CHiDE/Oral_History_of_Defence_Electronics/assets/photo_ws10field.jpg

Mike Unless they have fixed it this year, the other annoying thing is that the list of successful bids, when it comes, has only the lot number and price, but the catalog is lost and gone from the website on closing day. So if you didn't actually bid, or at least note the lot numbers of items interesting to you, there is no way to use the prices as a guide to what things are worth. If I remember I usually save a pdf of the catalog for that reason ! Iain

Goran - I think that one is an Valentine (Infantry Mk III) rather than a cruiser. Valentine used the same running gear as Cruiser A9 and Cruiser A10 - note the gap between the two sets of three road wheels, and the first and last road wheels are a little larger than the rest. I think the Russians had some thousands of Valentines but I believe almost all the cruisers except the pre-war A9 and A10 had Christie running gear as seen in the original post. The mantlet certainly looks more like Valentine to me. Iain

Alien USB (Upper Side Band) and LSB (Lower Side Band) are both forms of single side band - the difference is which half of the AM signal is removed. Both sets have to use the same sideband for the received signal to make sense (if you get it wrong it works as a kind of speech inversion scrambler). Most NATO HF radios standardised on Upper Side Band for SSB so USB was synonymous with SSB on those sets and it was never necessary to worry about - other HF users do use both side bands and the Clansman sets are therefore incompatible with default Amateur use of lower side band below 10MHz unless modified. The reason for using LSB below 10MHz relates to a circuit design trick that allows a single set of (expensive) filters to be used that was common in the early days of SSB in the 1960s. The RT320/1 (USB/LSB) and RT320/L (Yugoslav LSB only) commercial variants of the UK/PRC-320 HF manpack differed physically by having two sets of filters in the space occupied by the 100Hz frequency decade switch in the 320/1 or by swapping the USB filter for an LSB one in the 320/L. Larkspur had phase modulation as a side effect of using frequency shift keying for teleprinter traffic - more or less the same hardware is used for both. From what I'm told PM works better with strong signals and less well than AM with weak signals, on HF. Unlike SSB it isn't much of a bandwidth saving and became obsolete when Collins and others developed the narrow filters needed for SSB in the late 1950s not long after Larkspur was designed. Regards Iain

Also note the Vintage & Military Amateur Radio Society nets page at: http://www.vmars.org.uk/Regular_NETS_Details

Simon Depends on the set, and the amateur bands within its coverage. HF (Short Wave): HF sets (UK/PRC-320, UK/VRC-321, UK/VRC-322 and UK/PRC-319) operate from 1.5 to 30MHz using USB, AM and morse - as far as there are centres of activity 3.615MHz and 7.187MHz are the ones I know of for AM in particular. Actually the 319 has wider coverage up to 40MHz but not of anything that can be legally used. The sets can be legally used by cadets on their assigned frequencies and by licensed radio amateurs on any amateur band within the range, and the main ones are 1.8-2.0 MHz 3.5-3.8 MHz 7.0-7.2 MHz 14.0-14.35MHz 21.0-21.450 MHz 28.0-29.7MHz These bands are split in to segments for various kinds of transmission - in general morse code is at the low end and SSB speech is at the high end. Bands below 10MHz are generally used with lower side band (LSB) and above 10MHz with upper side band (USB) - Clansman sets in UK service only had USB so are more likely to be found above 10MHz unless the owners have converted them (which is fairly easy) or are prepared to be the odd ones out on 3.5 and 7MHz (which is not easy!). In practice most UK stations use 3.5 and 7MHz for daytime traffic within the UK - 7MHz works better in the afternoon - and the bands from 14MHz upwards are better for long distance use. UK amateurs are allowed to apply for a notice of variation to their licenses allowing secondary use of some military channels in the 5 to 6 MHz range. The channels are listed at: http://thersgb.org/services/bandplans/html/rsgb_band_plan_jan_2014-1_files/sheet009.htm VHF: The UK/PRC-349 covers 36 to 46 MHz which includes no legal amateur band. The UK/PRC-350 does 36 to 56MHz including the 50-52MHz amateur band and 51.5, 51.6 and 51.7 are probably among the most used as the amateur 20KHz channel spacing and the Clansman 25KHz spacing line up on these frequencies in a general purpose section of the band. The UK/PRC-351, UK/PRC-352 and UK/VRC353 all cover 30 to 76MHz FM only. This includes the 50-52MHz band mentioned above and also the 70MHz band on which 70.450MHz is the centre of Clansman activity here in Suffolk and North Essex. UHF: The UK/PRC-344 is a UHF air band set covering 225 to 400MHz AM. There is no UK amateur band within that range Band Plans: The Radio Society of Great Britain and other national societies publish "band plans" to help Amateurs share the bands between different kinds of use. These are voluntary in the UK but widely followed so are helpful to a listener in finding the traffic that they want. You may find the Radio Society of Great Britain (RSGB) band plans at http://thersgb.org/services/bandplans/html/rsgb_band_plan_jan_2014-1.htm helpful; Regards Iain

Hi I am also after a D24T workshop manual for the engine that has been transplanted into my new SUMB - it will be in the Volvo manual set for the 760 Turbo Diesel which also used these engines, if anyone has access to the Volvo CD-ROM manuals. There are several sources for PDF scans of the printed manual of the earlier normally aspirated D24 in Volvo 240 forums that I have found - PM me if you want a copy and I will be happy to send it somehow (it's a bit big for e-mail). I suspect that the core parts of the engine and their service instructions will be much the same however. Regards Iain

Welcome here ! Iain

Hi Caddy If someone starts breaking a SUMB (which would be a shame) within a 1/2 days travel of Suffolk I may be interested in the passenger side windscreen, tilt, hoops and body sides ! Iain

RR Services had stock of NOS Michelin before they moved, but the Michelin ZXL 10.5R20 develop side wall cracks in storage so you really need to select good ones in person. Iain

I've booked 17th and 18th July off work - will choose which day I come to W&P based on the weather forecast nearer the event as it is a 3h trip each way. Iain

Welcome here - hopefully I will see the Scammell around sooner or later ! Iain