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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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Old 6th Jun 2014, 9:19 am   #1
Gridiron
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Default BP413 Receiver, appropriate for D-Day Anniversary?

Hello everybody,

I bought this small receiver early on at Harpenden last week from the Bring & Buy, I thought initally it was a NAAFI receiver but the frequency coverage of 1.4-4.2 Mc/s seemed unusual. "Wireless for the Warrior" compendium 2 gives its purpose as for use in beach landing operations for the reception of situation reports, air raid warnings,etc, broadcast from ships to forces ashore. It originally was contained in a waterproof bag with headphones and aerial wire and dates from 1944. It is a basic superhet with built in loudspeaker, valve line up ARTP2,ARP12,AR8,CV65 and uses a combined 150v/3v battery (same as 38 set).
It was in working order when I tried it and appeared to be in untouched condition apart from missing knob, maker was Philco.

Regards, Mike
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Old 6th Jun 2014, 9:46 am   #2
G6Tanuki
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

That's nice - never seen one of them before!
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Old 6th Jun 2014, 3:28 pm   #3
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

A very interesting item, a sort of specialised utility set. Nice synchrocity to see it come up on the Forum while BBC2 is running coverage of the Normandy landings 70th Anniversary. A more tranquil invasion this time. Eddie Izzard [from Bexhill] was on earlier and said he's there nearly every year having gone originally with his dad!
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Old 6th Jun 2014, 4:06 pm   #4
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

That is a neat set- and a good find. I didn't spot that one- though I'd promised to be good and not come away with too much... Any idea what the IF is?- I wondered if starting at 1.4MHz meant it could have something higher than 455-ish kHz for the sake of image rejection in a simple front-end.
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Old 6th Jun 2014, 7:16 pm   #5
Gridiron
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

The Meultsee book gives the IF as 465kHz, the sensitivity is not very high at 80 microvolts for 15mW output. There was an earlier set for the same purpose, the BP412, the same circuit but much larger.I initially thought my set was not fitted with a frame aerial but it is,this is fitted around and in front of the control panel.
Mike.
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Old 7th Jun 2014, 9:23 am   #6
G4XWDJim
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

A very attractive set and a lucky find. I'd be very interested to know the measurements and see the circuit diagram if you have it. Are you likely to post pictures of the innards.

At first I wondered how much of the WS22 and R109 it incorporated but as it uses an ARTP2 which must be mixer oscillator I would guess not much. The IF can looks to be different too.

Presumably it was intended to listen to strong signals at broadcast station strength so would not have needed much sensitivity.

Jim
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Old 8th Jun 2014, 8:40 pm   #7
Gridiron
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

Hello Jim,
The front of the set is 10.5 inches wide and 7.5 inches high, front to back is also 7.5 inches, I don't have a circuit diagram. I don't want to remove the chassis to photograph the underside as this doesn't look an easy job, would involve unsoldering quite a few wires, as it looks to be original at the moment and working I am reluctant to do this.
Mike.
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Old 8th Jun 2014, 8:57 pm   #8
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

The British equivalent of the German Volksphanger?
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Old 8th Jun 2014, 10:51 pm   #9
Herald1360
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Default Re: BP413 Receiver, appropriate for D-Day Anniversary?

Wasn't that the Utility Set? This set has a forces provenance.
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