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 Post subject: Re: H2X PFF Equipment
PostPosted: Sun Dec 27, 2009 9:45 pm 
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As promised, here's the verbatim list of radio equipment found in 42-97600 from the German intelligence report. They seem to have found the data plates very useful......
Annotations in brackets by me.

Antenna mast with suspending transmitter
and distributer box.

J / 15 APS - 15 (Junction Box J-15/APS-15)
115 / 1 / 400 TO 2400

Transmitter:
RT - 15 / APS - 15 (Transmitter Converter RT-15/APS-15)
MD - 4 / APS 2 (Modulator for above)

Switchboard:
C - 33 A / APS - 15 (Control Unit C-33/APS-15)

****** *******:
CP - 3 / APS - 15 (Computer CP-3/APS-15)

Driftmeter:
R - 70 / APS - 15 (Receiver-Indicator R-70/APS-15)

Branch Driftmeter with Camera:
I D - 30 A / APS / 2 D (Plan Repeater Indicator-PPI ID-30A/APS-2D)

Camera Air Craft:
Type K 24

1 Impus Center:

1 panel with 4 instruments:

1 Transformer:
Inverder Unit
P e - 218 - C (Inverter Unit PE-218-C, part of Radar Set APQ-13)

Optical Devise:
Indicater
1 - 152 / A (Indicator I-152-A, SCR 718-AM Radar Altimeter)

1 Transmitter/Receiver:
Radio Receiver and Transmitter
B C - 788 - A (Radio Receiver and Transmitter BC-788-A, SCR 718-AM Radar Altimeter)

Amplifier:
A M 19 / APA - 14 (Torque Amplifier AM-19/APA-14, APS-15 Antenna Azimuth Stabiliser)

1) Radio Receiver BC-966-A (IFF Transponder)
2) Receiver Type R-1355 (GEE Receiver)
3) Radio Receiver BC-348-R (SCR-287 Liasion Radio Set Receiver Unit)
4) Radio Transmitter BC-375-R (SCR-287 Liasion Radio Set Transmitter Unit)
5) Antenna Tuning Unit BC-305-B
6) Radio Receiver BC-357-P (RC-43 Marker Beacon Receiver)
7) Dynamotor Unit Type 5016A (AKA PE-94-C)
8) Indicator Type 62 (GEE Indicator)
9) Radio Receiver BC-733-D (SCS-51 ILS Receiver)
10) Radio Transmitter BC-457-A (SCR-274-N Command Radio Set Transmitter)
11) Radio Transmitter BC-458-A (SCR-274-N Command Radio Set Transmitter)
12) Dynamotor Unit PE-73-CM (power supply for BC-375)
13) Radio Receiver BC-454-B (SCR-274-N Command Radio Set Receiver)
14) Radio Receiver BC-455-B (SCR-274-N Command Radio Set Receiver)
15) RF Unit Type 27 (Frequency module for R1355 GEE Receiver)
16) Inverter Unit PE-205-A (Power unit)
17) Modulator Unit BC-456-E (SCR-274-N Command Radio Set Modulator)

TTFN,
PB

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Paul Bellamy
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 Post subject: Re: H2X PFF Equipment
PostPosted: Sat Jan 23, 2010 12:27 am 
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The shipper just dropped off our newest piece of kit for the radar/radio room of Chuckie. I found this on an auction site that we all know and love? and just decided we had to have it.
Image

A NOS K-24 camera still in the original packing can't be all that common sixty-six years after it was produced...... Here are a few shots of the first time I started to unpack the accessories after receipt.
Image

Image

Image

Image

Image

Image

And here is a wartime shot of the same type camera mounted on the radar room aft bulkhead, courtesy of PB:

Image

I'll have to construct the long "stovepipe" (that's what it's called in the radar operator guidebook) lens extension and find the radar scope repeater later.

I'll take a few photos of the camera on Sunday when we completely unbox it for the first time. I wanted to let the co-owner (CrewDawg) take part in the unveiling ceremony....... :wink:

Scott


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 Post subject: Re: H2X PFF Equipment
PostPosted: Sat Jan 23, 2010 1:31 am 
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I'm so glad you guys snagged that particular K-24.....

I saw it with all it's connectors etc. and thought that if there would be an ideal one for Chuckie, that's it, and fate came through for you. :D

Fingers crossed I'll get to see it first hand in August.

TTFN,
PB

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 Post subject: Re: H2X PFF Equipment
PostPosted: Sat Jan 23, 2010 3:54 am 
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We'll be looking forward to August!

The camera is truly a nice find. I almost hate to pull it out of the box it's rested in for six decades, but it will find it's way into Chuckie, hopefully this spring.

Scott


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 Post subject: Re: H2X PFF Equipment
PostPosted: Mon Jan 25, 2010 3:39 am 
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Here are a couple of photos of the K-24 camera after being unboxed today.

Image

Image

The next homework project I'm planning to start is the little instrument repeater panel at the radar operator's station. He had an airspeed indicator, altimeter, ammeter, and radio compass indicator to tend to, as well as an outside air temperature indicator that is mounted to the side of the fuselage. With a little snooping in the parts room I found these two, and I'd bet we have a spare ASI and altimeter also:
Image

The original panel:
Image

As we were leaving this evening Steve, one of our pilots/mechanics asked me if we were going to use Flight Following on the way home. I said I was, and he handed me this to drive the Air Traffic Control radar crazy--it's a package of Window, or as we call it on this side of the Pond, chaff:
Image
And, no, I did not chuck it out on the way home......... :wink:

Scott


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 Post subject: Re: H2X PFF Equipment
PostPosted: Fri Jan 29, 2010 6:13 pm 
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I'm doing more homework since I'm currently stationed in "Ice Station Oklahoma".......We've been getting freezing rain/sleet/snow yesterday and today.

Once again, here is the instrument repeater panel that the radar operator used.
Image

I laid out the dimensions and made a rough template of the panel face yesterday. I'll be able to lay out the instrument locations and panel face dimensions on aluminum quite quickly once I get back to the sheetmetal room at the Museum.
Image

Image

Scott


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 Post subject: Re: H2X PFF Equipment
PostPosted: Fri Jan 29, 2010 7:19 pm 
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Good start Scott.

I blew the original photo up a couple of weeks ago to attempt to identify the dials and match them with known part numbers where possible.

Top Left: 0-700 MPH ASI Type F-2
Top Right: Altimeter AN5760-4
Lower Left: Hmmm, Ammeter or Volt meter? It appears to be marked AC, and is a 4-screw fitting.
I'm still going through the lists to try to match this one. Plenty of IDs for what it isn't though. ;)
Lower Right: AN 5730-series Compass

As for the three toggle switches above.......
I wonder if the shrouded one is for extending the radome. It would make sense to prevent it being extended when on the ground for example.

I'd better get back to the manuals.

All the best,
PB

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Paul Bellamy
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 Post subject: Re: H2X PFF Equipment
PostPosted: Fri Jan 29, 2010 8:25 pm 
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Paul,

I think the guarded switch is some kind of master power switch. Remember, the radome is hand cranked, not electrically operated. Incidentally, I've found a possible source for the jackscrews I need to complete the Chuckie radome trapeze installation.

The smaller instrument is a voltmeter, to make sure exactly 115V is getting to the radar set. I have an ammeter here but will be hunting down an AC voltmeter instead. I concur on the airspeed indicator and altimeter.

Scott


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 Post subject: Re: H2X PFF Equipment
PostPosted: Fri Jan 29, 2010 9:46 pm 
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Ta Scott,

I wasn't sure if they ever installed an electric motor for the radome, not a switch you'd want to accidentally throw on the ground.... crunch! :lol:

Factoid: The pattern of the switch guard with the rectangular cut-out is the same as that used for certain installations in a P-51 Mustang. I'll dig through the P-51D E&M manual and see if I can find it.

EDIT: The guard is the same pattern as that over the emergency switch on the SCR-695 IFF set.

TTFN,
PB

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Paul Bellamy
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401BG (H) Association
401BG (H) Historical Society (UK)

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 Post subject: Re: H2X PFF Equipment
PostPosted: Mon Mar 08, 2010 1:41 am 
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It's been a while, so here's a little update on the Chuckie PFF Project.

I found the answer to my radome mold problem yesterday at a sporting goods store. I'd gotten a quote for a styrofoam ball to make the hemispherical end of the form but the price was astronomical. We picked up a workout ball yesterday for twelve dollars and I commenced to blow it up with the air compressor. After letting out a little bit of air it slips right into the cylinder.
Image

All I need now is a few gallons of fiberglas resin and I can start laying up a radome.

Scott


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