[ARC5] RAJ CBY-46046, AC Power Unit CBY-20040

Wed Jul 27 17:58:35 EDT 2016

Can't recall the requirements for photo size, so I'm not sure this will
make it to the lists, but you should get it okay, Mike. I have other photos
as well showing connectors, internal components, etc.

Not sure if this is the same thing Hue is referring to. It does appear to
have separate toggles for different banks of connectors, though. Says it
was made by N.A.S, Alameda and it looks as though it can run either a
RU/GF/LM set up or several RU receivers. Only nomenclature is 'Model B'.

Feel free to repost if it's too big to make it through the QTH filters. My
fault for not having written it down somewhere.

~ Todd,  KA1KAQ/4

On Wed, Jul 27, 2016 at 5:36 PM, Mike Morrow <kk5f at earthlink.net> wrote:

> Hue wrote:
>
> > ... anyone know who the fellow was at Puyallup WA
> > hamfest in March 2016, with the “small version” of the RUGF A.C.
> > power supply? The version that dispensed with control boxes,
> > having all control box functions right on the unit?
>
> I don't know that person, but I know something about the 1934 Receiving
> Set RAJ that you describe.  Its receiver is CBY-46046 and it is similar to
> the 1834 RU-3 CBY-46036.  The RAJ CBY-20040 AC power supply that you seek
> is described on the last lines below:
>
> ----------------------------------------------------------
> Receiver CBY-46046 Model RAJ, A.R.C. Order NOs 34679, 02-10-1934
> Type:                Tuned Radio Frequency
> Modes:               CW (A1), MCW (A2 and A3)
> Receiver Stages:     RF AMP1, RF AMP2, RF AMP3       3 x CRC-38078, Type 78
>                      AGC                                 CRC-38077, Type 77
>                      DETECTOR                            CRC-38077, Type 77
>                      HETERODYNE OSCILLATOR (BFO)  Half x CRC-38233, Type
> RK-33
>                      AF AMPLIFIER                 Half x CRC-38233, Type
> RK-33
> AUTO/MANUAL Gain:    AGC is applied to all three RF amplifier stages.
>                      MGC is applied to all three RF amplifier stages.
> AF Output Impedance: LOW
> AF Low Pass Filter:  In AF transformer primary.
> - Heterodyne oscillator operates at one-half the receive frequency, and it
> is
>   coupled into the cathode of the detector stage.  It does not affect the
> RF
>   amplifier or AGC stages.  This allows AGC use in CW mode, as well as MCW
> mode.
>
> Receiver is similar to 1934 command/liaison aircraft receiver RU-3
> CBY-46036 except:
> - Heater power is connected for 6 volts ac/dc operation.
> - There is no control box.  These controls are on the front panel:
>     AUTO-MANUAL gain control select switch
>     CW-MCW heterodyne oscillator switch
>     Volume/Sensitivity INCREASE OUTPUT control
>     Headphone jack replaces ICS audio input jack
> - There are no LOOP connections or switch.
> - AF Output Impedance is LOW only.
> - The power connector has six terminals.  (CBY-46036 has ten)
> - The RAJ uses a set of coils for full 224 to 13575 kHz coverage:
>     Coil Set   Frequency Band
>     CBY-47065    224-  350
>     CBY-47066    350-  545
>     CBY-47067    545-  850
>     CBY-47068    850- 1330
>     CBY-47069   1330- 2040
>     CBY-47070   2040- 3000
>     CBY-47071   3000- 4500
>     CBY-47072   4000- 6000
>     CBY-47073   5400- 8100
>     CBY-47074   8100-12500
>     CBY-47075   9050-13575
>
> Power Supply CBY-21173
> Input    6 vdc
> Output 360 vdc, -80 vdc, -72 vdc, 6 vdc
> Dynamotor unit is the same as RU-3 CBY-21108 except:
> - The dynamotor uses 6 vdc input
> - It has a power fuse
> - It has a power ON-OFF switch
> - There is no transmitter modulator bias voltage output.
>
> Power Supply CBY-20040
> Input  120 vac/60 Hz
> Output 250 vdc, -80 vdc, -72 vdc, 6 vac
> - Transformer with Full-wave Rectifier CRC-38180 (Type 80)
> - It has a power fuse
> - It has a power ON-OFF switch.
> ----------------------------------------------------------
>
> I doubt that there many RAJ systems were made.  Any surviving component
> would be very rare.
>
> I have never found any documentation for an AC Power Supply Unit built for
> GF/RU sets.  I would be interested in hearing any and all details.  I have
> copies of manuals for almost all GF/RU sets and there is no mention of such
> a thing.  The RAJ CBY-20040 does not work with anything except the RAJ
> CBY-46046, so it can not be a smaller version of some other AC supply for
> the GF/RU.
>
> Mike / KK5F
>
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