Communications,  Test Equipment & Interesting things….

Here we have a selection of vintage goodies that do not really fit into our other sales pages.   One off items of interest to radio and maybe in the future audio enthusiasts.   Most things are as found but a full description of their working state will be included.   Some items will be serviced and come with our standard six month return to base warranty. 

Vintage and modern communications equipment,  test equipment for your workshop,  useful bulk components and all those kinds of things.    This page will not be updated as often as our main overhauled and diy radios for sale part of the site. 

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Epoxy resin anyone?  This is what happens when you refuse to replace your valve radios grid coupling capacitors!   

Stock last updated on 10/3/18
New items added on 10/3/18

Lots of new goodies…..

1960/70s HT Variable DC Power Supply   Farnell E350
This unit is one of those must have pieces of equipment if you are interested in making your own valve projects,  testing HT circuits,  building amplifiers,  running small valve transmitters,  powering a 1155 receiver and so on.  The list is pretty much endless.  If you don't fancy making the mains end of the project then read on.

So what we have here is a 100mA DC power supply which is fully variable from 0 to 350V   -  heaps of current for this kind of thing.   Your average receiver usually only needs 20mA or so on the HT line.   This unit also has multiple low voltage AC outputs for running heater chains etc.   

There is current limiting available on the rear of the unit.   Fantastic heavy build quality  -  the chassis is really well thought out and put together.Variable regulation uses a Mullard EL34 as the current shunt  -  no expense spared!    Fully checked over,  overhauled where required and has been run on a load whilst being monitored on the oscilloscope for an extended period.  The meters are large and very accurate.

The AC outputs are  3.15  -  0  - 3.15V AC at 2A
                                0,  2.5, 5, 6.3V AC at 3A
The DC output is in switched 50V ranges,  up to 350V  @ 100mA max.

We have several units available,  all basically in the same good cosmetic condition.   

Price £150      UK Delivery  £10 
A word of warning.  350V at 100mA DC is enough to kill anyone so you must treat those output connections with respect!  There are both internal and external fuses to protect inputs and outputs.  A copy of the full user manual will be provided.   
So far we have sold about 6 of the units  -   just a couple left now as I have grabbed one for audio projects.  Tempted?

Late 1940's early 50's Advance P1 AM RF Signal Generator

We recently sold another generator much the same as this one,  although that example had a better cabinet.    This particular one could do with a coat of silver grey hammerite to tidy it up.  Or just use it as a cheap RF workhorse.  You are going to need to replace the mains lead on it and possibly a few capacitors to get good stability however it is "working"  as found.  RF coverage is 100 KHz to 100 MHz. 

Price £25      UK Delivery  £12

Eagle SG70 AM RF Signal Generator   
Working as found.  It needs a bit of a clean up and a service of the pots etc,  well worth the effort though as the frequency coverage is impressive.  120 KHz through to 500MHz in six ranges.  There is also a built in xtal oscillator for crystal checking.  Nice and compact, and very easy to operate. 
Price £38     UK Delivery  £10  5.5x8x6" dimensions.   

Advance Type 62 AM RF signal generator

7.5  -  220 MHz coverage. 6 Ranges with a very clear,  easy to read dial.  Like most of the other Advance RF generators you also get an audio out signal for tracing AF circuits.  I do like this particular model,  it has the largest dial of all the Advance range, yet the cabinet is not as large as some of the earlier models.  Seems to be working well, a service would be beneficial and then you can get busy tweeking your IF cans to your hearts content!  Sold as found,  in very clean and tidy condition.   
Price £50      This one has gone.  Sold.   

C1960 Eddystone 850/2 LW / VLF Receiver. For restoration.
This is a rare one.   I can't say I have ever seen another  -   have read a little about it though on the Eddystone User Group website,  which is well worth a visit.  So what is it?   10 KHz -  300 KHz in 5 band spread ranges.  So it covers things like submarines, beacons, shipping, Radio 4… and so on.   You might need a light house though if an efficient antenna is to be erected for VLF!  Back to the radio in question.   It is more or less all there.   The output valve and rectifier are missing,  as are two of the plastic toggle switch levers (they screw onto the switch knuckle) and one knob has gone.    The good news is though that apart from this parts theft, if that is what it is the rest of the chassis looks to be complete and not messed about with at all.  The cabinet, dial and front plate are all nice and tidy.  You need to have a good look at the pictures.   As eddystones go this one is quite large too,  at 17x12x9"  it is a bit of a beast.  Interesting all the same and something you might want to spend a bit of time sorting out.   Again we have the full original manual for it which will be included with the radio. 
Price £95     UK Delivery £30   It is heavy

1950/60's Audio Wattmeter Absorption ZD00661 
Made by Marconi. 
This is a very useful piece of test equipment for any radio repairer.  It is the audio level meter that is often mentioned in things like Trader Sheets when going through the alignment stages.   This meter acts as a dummy load for the loudspeaker output  (with the load impedance to be set between 2.5R and 20K ohms) and can measure 200 uW to a maximum of 6W.    So the idea is you set the meter to a high wattage level,  feed in the audio to be measured.   Switch the meter down to a point where you get a usable measurement on the needle.  Do your alignment on the set in question,  watching the meter for maximum deflection.    You can also make accurate measurements of the receivers sensitivity if you know the exact level of the input signal on test.  As I said,  very useful, especially if your ears are not as good as they used to be! Has been thorougly tested and is in good working order / condition.  Ex military issue. 
Price £45     UK Delivery £10   

1949 GEC BRT400 Communications Receiver for restoration
Another not so common receiver of large proportions.  GEC decided to have a go at making comms gear,  and many like this model ended up in foreign diplomatic offices around the world.   It is a bit different looking from the other sets of the time,  I suppose rather like an Eddystone of later years, having taken a vast amount of steroids. 

The good news is it is working after a fashion in its current state.  There is quite a pronounced mains hum on the audio so one or several of the filter capacitors will have failed.    At least it does prove everything is present,  if not entirely correct.  The S meter works well.   The chassis looks to be untouched  -  the only complaint I have to report is that the bottom panel is missing.   This will be easy to fabricate from a piece of aluminium.  It is simply a plain panel.  Or just leave it open,  air cooled.  I won't tell anyone.    You are going to have to replace some capacitors at the very least.   We have the complete owners / service manual for this which will of course be included.   Coverage is 150 KHz to 33 MHz.  AM / CW etc.  There is a bit of screen printing wear on the front panel (see pictures).  Nothing too serious.  The important  tuning dial is however, perfect.   Not quite as heavy as an AR88 but it is up there with an RA17 in terms of mass.   Good project.  Dimensions are 20x11x15"

Price £125    UK Delivery £35   (you are welcome to collect!)

C1956 Eddystone 730/4 General Coverage Comms Receiver.  As used by Royal Signals, Coast Guard etc.   For light restoration.
Here we have a staight forward project for someone  -  this Eddystone is working pretty well as is.   No doubt some capacitor and a few resistor replacements will make a big improvement to performance however as a starter into the more advanced eddystone receivers this could be a good one.   The case has a few marks and light scratches  -  it is all in original condition,  the tuning dial is smooth running.  With the BFO switched on and the RF gain backed down it is quite possible to tune into SSB transmissions on the amateur bands.   Nothing much else really to tell you,  other than you will need a 2 pin mains lead or better still do away with that and fit a hard wired cable.  You can earth the chassis on this military spec model.     Full HF coverage from MW through to 30 MHz, supplied with a full copy of the service and user manual.
Price £145      UK Delivery £25   It is heavy!

1973 KW 202 HF Amateur Bands Communications RX  Fully Overhauled
I will most likely regret selling this rare radio,  it has been here for a while and was one of my favourite listening  receivers.    Could this model be the last commercially manufactured valve only communications receiver here in the UK?   By 1973 things were moving towards integrated circuits in a big way,  digital synthesizers were not too many years ahead of this.  However KW of Dartford were not having any of that.  So they built this fantastic amateur bands receiver.   It really is good too,  and unlike so many earlier valve designs it was made for SSB.   It has a proper product detector, with selectable side bands.  There is also a Q multiplier and effective notch filter.     The chassis is constructed partially on a fibre glass printed circuit board and housed in a rugged cabinet.   This has been fully overhauled and is in perfect working order  -  the sound quality and performance are really top notch.  I particularly like the heavy die case control knobs and slow motion tuning drive.   The cabinet and front panel are excellent,  you could say perfect condition and the original packing delivery box with matching serial number is included.   
Frequency coverage,  10,15,20,40, 80 and 160M amateur bands with the AM bits up and down from each range.     The receiver need an external speaker, I have a lead with the correct plug to fit the LS socket on the rear of the case.    They also made a matching transmitter to go with this but alas I don't have one of them. 

Price  (fully overhauled)  £250   
UK Delivery £20   

1941 RCA AR88D General Purpose Communications Receiver
Fully Overhauled.   
We have been busy.  Or indeed that should be "I" have been busy.   This has to be one of the best all round 1940's communications receivers and a good one,  in working order can still to this day hold it's own place against most modern communication receivers.  But that is not the reason for owning one,  no it is all about the warm glowing dials,  the silky smooth tuning control driven through a gearbox that is a marvel of radio engineering and the soft mellow audio tones that can be produced through a decent 3 ohm speaker.   Everything is working well on this receiver,  it has had a thorough going over and performance is good right up to 32 MHz.  The 5 stage filter is very effective.  Have it on wide for general AM listening and narrow it up a few clicks,  back down the RF gain control,  set the AVC to auto and turn the BFO on and you can listen to SSB on the amateur bands.   Or the odd Polish numbers station.   Or as I often do in my slightly crazed existence listen into some North Korean drivel on the broadcast bands.  It's all possible with an AR88.   As is the chance of getting back ache,  as fitted in the almost armour plated cabinet it weighs in at well over 100lbs.    So you will need a decent bench to put it on.    The AR88 is the radio that got me started in all of this,  we have had one in our family since the late 1940's and my first memories of playing radio were spinning the dials around on  our AR88D back in the 70's (it's a blue painted RAF version,  with diversity control).  Most likely listening in to Radio Moscow or one of those East German number stations.   I am still hooked,  and the family AR88 has pride of place in my radio den.
This one is in excellent,  restored condition.   They don't often turn up like this. 
Price £495     This price includes personal delivery within the UK mainland,  I am afraid it is not available to ship overseas or to Ireland.  However I would be willing to meet up at a dodgy car park next to a British ferry port…..   There is a fuel surcharge of £25 for northern Scotland (north of Edinburgh/Glasgow) and Cornwall.   I will give you a hand to set it up and any driving lessons required for use.  Supplied with a good copy of the MOD users manual.
I am afraid to say this AR88 has gone too.  Sold.  Oh and yes I will be delivering to a carpark in Portsmouth!  Hello John.

1942 Hallicrafters S27U  ROYAL NAVY 110D/21 
Special Projects AM/FM VHF Receiver.  Used for the Navy "Battle of the Beams" operation. 
Now this is a rarity.   In its day a top secret VHF communications receiver,  built for the Royal Navy by Hallicrafters of the USA.  This particular one was accepted into service December 1942.   The navy were using this receiver and direction finding equipment to plot the VHF radio "beams" that the Germans were using to direct aircraft raids across Europe and the UK.   Highly classified!  You can find out more on this subject online.     What we have here is the real McCoy,  it's been dry stored for 50 odd years in a defunct shop and appears to be completely original inside and out.   It was quite dusty and I have given it a little clean up for the photos but not gone to any great lengths (that's your part of the fun!)    The frequency coverage is 28 to about 150 MHz,  with AM/CW and FM modes.  So it should pick up the broadcast stations,  plenty of aircraft and you might even get the odd amateur on  6 or 2 meters.   The chassis is very tidy.   This will be a great winter restoration project.   
Sorry this one is sold.

C1940 National HRO TYPE HRO-MX  Communications receiver,  complete with matching mains power supply unit and 10 coil packs.  Stamped US ARMY.   Fully working,  serviced.
Here we have yet another WW2 classic communications receiver, in very good working order across the whole HF band spectrum.  The HRO uses coil packs,  see the picture which slot in the font panel,  depending on what range you want to listen to.   This radio had previously been overhauled to a good standard  (the work is all under the chassis -  it is not as neat as it could have been although electrically perfectly acceptable.  Just to make sure I re-soldered most of the connections!).  The only little fault to mention really is the S Meter,  which works but the end of the pointer is bent.    This could be opened up and straightened,  or it is a simple job to replace should you be able to find a suitable meter.  They are relatively easy to come by in the USA. Also included with the receiver is the original HT "dog kennel" power supply unit.  As you can see from the pictures the metalwork is very clean and tidy.  Very selective radio,  as used by the code breakers at Bletchley park amongst others during the war.   I have given it a good thorough service,  making sure that everything is working and up to scratch.   Nice to have the complete set,  all in one place.    The power units are harder to get than the main receiver.
Sorry this one has gone.   Shortly it will be going to live with a B40 and AR88 in Scotland...

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