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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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24th Jan 2021, 11:37 pm | #1 |
Diode
Join Date: Jan 2021
Location: Henley-on-Thames, Oxfordshire, UK
Posts: 3
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R1155 Additional N/S Knob to Left of Tuning Knob
Hi All My first post on the forum so I hope I get this right.
While looking around the web for photos to help with my R1155A I came across a colour picture on Wikipedia(Imperial War Museum Photo) showing the Radio operators position. The photo shows an R1155 with a small marconi knob to the left of the serial number plate under the main tuning knob. The Letters N (orM) and S painted above. The question is what might it be for. Could it be a heater switch for the D/F valves Navigator or Standard. Really interesting picture. Any Ideas |
25th Jan 2021, 2:05 am | #2 |
Dekatron
Join Date: Jan 2006
Location: Ramsbottom (Nr Bury) Lancs or Bexhill (Nr Hastings) Sussex.
Posts: 5,814
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
Welcome to the Forum. I'm sorry I can't help you with that Rob but it's a great photo! Thanks for posting. There's nothing near the serial plate on my [unrestored] set so maybe it's a specialised addition? I'm sure there will be lots of expert ideas to follow. You are in the right place
Dave W |
25th Jan 2021, 2:41 am | #3 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
I've seen that picture in many places but only in B&W, so it must have been hand coloured, if not Photoshopped.
I hadn't noticed the extra knob though, quite intriguing. it appears to have two positions N & S so something to do with the DF I guess. It appears to have had a lot of use, judging by the marks on the panel.
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-- Graham. G3ZVT |
29th Jan 2021, 5:32 pm | #4 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
That is interesting because it's a rare mod state. Have a look at other images and it's not there. It's not something I have ever seen in real life and I've seen, and owned, a few R1155's! As has been said it certainly seems to have had a lot of use in this particular installation. I'll ask about...
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David, G4YVM. |
30th Jan 2021, 4:34 pm | #5 |
Heptode
Join Date: May 2014
Location: Salisbury, Wiltshire, UK.
Posts: 998
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
I've spoken to Ben Nock and he has never seen it either.
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David, G4YVM. |
30th Jan 2021, 4:42 pm | #6 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
I wonder if it's anything to do with a training setup?
Lawrence. |
30th Jan 2021, 5:14 pm | #7 |
Dekatron
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 4,385
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
As the war progressed, more and more powerful radar pulses were being generated in the locale of bomber formations for ground-mapping and rear-warning- could some R1155s have grown a noise-suppressing circuit in the way that some CR100s did? Random stab-in-the-dark- could 'N' and 'S' be normal and suppressed?
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30th Jan 2021, 5:52 pm | #8 |
Dekatron
Join Date: Aug 2007
Location: W.Butterwick, near Doncaster UK.
Posts: 8,923
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
Sounds a possibility as I guess it wont mean North /South. I have 3 R1155,s but none have the extra knob.
Must information somewhere out there.This has got me searching to no avail as yet.
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G8JET BVWS Archivist and Member V.M.A.R.S Last edited by HamishBoxer; 30th Jan 2021 at 5:59 pm. |
30th Jan 2021, 11:55 pm | #9 |
Tetrode
Join Date: Mar 2018
Location: Nottingham, Nottinghamshire, UK.
Posts: 88
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
Do we know the provenance of the photo? Was it taken during WWII or could it be a more recent mock-up.
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31st Jan 2021, 10:36 am | #10 |
Dekatron
Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
As it happens, yes.
It appears on the R1155 Wikipedia page. Description English: IWM caption : Flying Officer R W Stewart, a wireless operator on board an Avro Lancaster B Mark I of No. 57 Squadron RAF based at Scampton, Lincolnshire, speaking to the pilot from his position in front of the Marconi T1154/R1155 transmitter/receiver set. Date circa 1943
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31st Jan 2021, 11:16 am | #11 |
Nonode
Join Date: May 2007
Location: Preston, Lancashire, UK.
Posts: 2,510
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
I'm sure this photograph was thoroughly discussed on here a couple of years ago, with no conclusion.
Can anybody find the thread, I can't? Andy |
2nd Feb 2021, 12:19 pm | #12 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,172
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
Hi Folks, it also appears in the spring 2016 edition of Radio Bygones, P21
Ed |
2nd Feb 2021, 5:34 pm | #13 |
Diode
Join Date: Jan 2021
Location: Henley-on-Thames, Oxfordshire, UK
Posts: 3
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Re: R1155 Additional N/S Knob to Left of Tuning Knob
Thanks for the replies. I like a mystery. The original source of this photo was the Imperial War museum. I guess it is unlikely that anyone who used this set is still around. It would be nice to solve.
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