[MRCA] R-45/ARR-7 Power Supply?

[Jeep Platt]

Been there, done that. Two possibilities. I used the power xformer from an HP 608 sig gen. Form/fit into the PP-32 is perfect. Likewise works fine for HB supply.  I just happen to have one xformer left, but that's another story.  The filter caps in the PP-32 need higher values of C.  Power connectors came from Bill Perry.

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From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> on behalf of W2HX <w2hx at w2hx.com>
Sent: Saturday, May 27, 2023 6:13:36 PM
To: mrca at mailman.qth.net <mrca at mailman.qth.net>
Subject: [MRCA] FW: R-45/ARR-7 Power Supply?


OOPS, That should be 270 VDC @ 135 mA not 2,700 VDC. Yikes





73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos



From: milsurplus-bounces at mailman.qth.net <milsurplus-bounces at mailman.qth.net> On Behalf Of W2HX
Sent: Saturday, May 27, 2023 5:56 PM
To: milsurplus at mailman.qth.net; mrca at mailman.qth.net
Subject: [Milsurplus] R-45/ARR-7 Power Supply?



Hello friends.



I just acquired a nice ARR-7 that was electrically restored and aligned by a very competent fellow (pic attached). He made a 60 Hz AC-DC power supply for it, but it was crazy expensive. So here goes. The specs I need are:

2,700 VDC @ 135 mA

25 VDC @ 350 mA (for scanning motor, which is half the fun!)

6.3 VDC @ 4.0 A



Does anyone know if there is some existing power supply from some other piece of equipment that might have similar specs that I could begin hunting for? I know there is the PP-32/AR but my understanding is that this is a 400 Hz unit (380 Hz to 1,000 Hz).



If there isn’t another commonly available PS that would supply these, I may have to resort to building one. On ebay there are transformers with multiple secondaries but searching for such a beast is very difficult. Any advice on searching for a multiple secondary transformer? And of course, should all else fail, I could make a PS with 3 transformers if necessary.



Any suggestions welcome.





73 Eugene W2HX
Subscribe to my Youtube Channel: https://www.youtube.com/@w2hx/videos




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