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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment. |
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18th Feb 2021, 4:17 pm | #1 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Aircraft compass unit E124
Friend Kevin acquired this unit with the intent of making a TV set from it.
No can do because the CV5164 CRT requires a very high EHT, >20KV. Google search reveals the E124 was made by Ekco Electronics Ltd and was used in the Bristol Britannia aircraft. CV5164 = MM31-10. https://frank.pocnet.net/sheets/129/m/MM13-10.pdf DFWB. |
18th Feb 2021, 5:36 pm | #2 |
Nonode
Join Date: Dec 2012
Location: Stockport, Greater Manchester, UK.
Posts: 2,106
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Re: Aircraft compass unit E124
Surely the EHT would be generated in the unit? Wouldn't make much sense to generate it externally
More pics please!
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18th Feb 2021, 5:57 pm | #3 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: Aircraft compass unit E124
Compass Unit? I think that is probably part of the Ekco weather radar.
Andy |
18th Feb 2021, 7:58 pm | #4 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: Aircraft compass unit E124
Apparently it had to be mounted at least 2'9" from a compass.
Lawrence. |
18th Feb 2021, 9:25 pm | #5 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Aircraft compass unit E124
Extract from the advert for the unit:
Compass Indicator E124 by Ekco Electronics England. . Compass Indicator E124 by Ekco Electronics England for parts or restoration. Condition is "For parts or not working". I assume this is from an aircraft cockpit display? It may come from a DH Comet. Not sure of era or anything else, possibly 1950 to 1970s? Not working, sold for parts or restoration. Condition: For parts or not working, Julesomega wrote: "Surely the EHT would be generated in the unit? Wouldn't make much sense to generate it externally More pics please!" EHT is supplied from an external source. Will take more pictures of the unit tomorrow. DFWB. |
18th Feb 2021, 10:38 pm | #6 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,511
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Re: Aircraft compass unit E124
I believe that display unit is shown as a component of the Ekco E-120 weather radar system shown in this link -
https://www.radartutorial.eu/19.kart...rte076.en.html Unfortunately detailed information on the Ekco radars is notoriously sparse on the internet. I suspect the seller of the unit didn't know what it was. A lot of avionic equipment is marked with a 'Compass Safe Distance', this is a minimum distance to avoid disturbing the operation of a compass sensor. Andy |
19th Feb 2021, 1:01 am | #7 |
Heptode
Join Date: Jan 2008
Location: Ashhurst, Manawatu, New Zealand
Posts: 571
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Re: Aircraft compass unit E124
DH4C cockpit panel assembly. The compass and ADF display are clearly shown on the captains panel to the bottom left of the "T" below the 'rate of climb' instrument. The co-pilots compass is hiding behind the left hand side of his control column. The weather radar display is in front of the captain's right knee. It looks like the panels have been 'ratted' for some other aircraft.
Most passenger aircraft are left hand drive.
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19th Feb 2021, 9:00 pm | #8 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Aircraft compass unit E124
Three more pictures of the E124 unit.
The one and only valve present in the unit is a CV4014 (EF91/6AM6) The EHT connection on the CRT resembles that on the MW6-2 projection TV tube. DFWB. |
19th Feb 2021, 10:31 pm | #9 |
Tetrode
Join Date: May 2019
Location: Limoges, France.
Posts: 60
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Re: Aircraft compass unit E124
I would not have thought getting 20kV is very difficult these days, plenty of units available from China. I doubt that they are very stable but it might get the unt working. I hve half a dozen 5kV supplies from old CRT based units that were scrapped
Peter F4VSA |
19th Feb 2021, 11:41 pm | #10 |
Nonode
Join Date: Jun 2008
Location: Coningsby, Lincolnshire, UK.
Posts: 2,819
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Re: Aircraft compass unit E124
Someone posted a link to an EHT generator a while back, I think it’s still in my watch list, it was only a couple of quid and generated 15KV. Might be worth a look?
Regards Lloyd |