Please could anyone give me information about this, especially the pinout (25)pin, and schematic if possible was told this was a microwave radio psu thanks in advance.. should read PYE/ phillips

 

Found this:

https://hamradio.engineering/histor...down-converters-filters-varactor-multipliers/

 

Found this:

https://hamradio.engineering/histor...down-converters-filters-varactor-multipliers/

Thank you mr chips , I have seen this but doesn’t talk about the psu side, but I have taken note of the author and will try to contact him..

 

https://picclick.co.uk/Pye-Philips-L700-48V-DC-PSU-to-15-357179473964.html

 

NONE of the photos show anything related to the connections or specifications of the power supply.
The closest we can get is seeing the two "power tab" voltage regulators in the one photo. THAT tells us that neither supply can deliver over one amp of current.
So now for questions: Is there a mains power connector, or a power cord, on the power module enclosure? Are there any labels on the exterior?
In the file name associated with the photo attached by Mr.Chips, we get a hint about what the supply voltage might be:" Pye-Philips-L700-48V-DC-PSU-to-15-357179473964.html. " That hint tells us that at least some version of that equipment is powered by the telecom system's 48 volts power system. That would explain the lack of a mains operated power transformer in the post #1 photo. What we can only guess at is the identity of the item in the middle of the center photograph.

 

NONE of the photos show anything related to the connections or specifications of the power supply.
The closest we can get is seeing the two "power tab" voltage regulators in the one photo. THAT tells us that neither supply can deliver over one amp of current.
So now for questions: Is there a mains power connector, or a power cord, on the power module enclosure? Are there any labels on the exterior?
In the file name associated with the photo attached by Mr.Chips, we get a hint about what the supply voltage might be:" Pye-Philips-L700-48V-DC-PSU-to-15-357179473964.html. " That hint tells us that at least some version of that equipment is powered by the telecom system's 48 volts power system. That would explain the lack of a mains operated power transformer in the post #1 photo. What we can only guess at is the identity of the item in the middle of the center photograph.

 

This is the only connection, on the frame is, code AT04854/1 , and car no L700

 

The ebay description suggests 48 VDC input, +15 VDC and -10 VDC output.

Which pins on the connector are being used?

 

Can not actually see where all leads go as it’s 2double sided pcb sandwidged close together,best I can do is in photos so 19 of the 25 are used. The 48vdc input I’m not sure of,, because the highest rated electrolytic capacitor is 40v

 

In the one photo we see a tag of some sort. What is on that tag??
And now I am seeing that it looks like some sort of regulated switcher power supply.
A reasonable guess is that it is either a buck-mode supply or some sort of inverter that delivers the 10 and 15 volts, from the 48 volt DC supply input. Not sure where you will get 48 volts DC at whatever power level is required.

WHAT does the TS hope to use this supply for??

 

In the one photo we see a tag of some sort. What is on that tag??
And now I am seeing that it looks like some sort of regulated switcher power supply.
A reasonable guess is that it is either a buck-mode supply or some sort of inverter that delivers the 10 and 15 volts, from the 48 volt DC supply input. Not sure where you will get 48 volts DC at whatever power level is required.

WHAT does the TS hope to use this supply for??

I’m just trying to get started again after a 40 year break , my main interest is power supplies vintage and views of eventually build myself a linear lab power supply,Not very knowledgeable but keen , this psu intrigues me as not seen such like before, thanks for your help

 

The supply shown is about as different from what most applications would use as is possible. It is a definite purpose assembly type, definite application, package that lacks all of the features that would be useful in any sort of "LAB" power supply. It does look like a good example of an item designed for good reliability in a medium vibration environment. It is almost as far opposite from a variable lab poser supply as you can get " my main interest is power supplies vintage and views of eventually build myself a linear lab power supply." I am not certain that I would call it a "vintage" package. Possibly a bit obsolete, but comprable to presently used technology. (Far from bleeding edge technology.)

 

The BYW29 tab like devices on the bottom are likely 8A 150V diodes. The Anode seems to be tied to ground. There are a couple larger TO-220 type of transistors from the top side picture, plus a smaller 3 legged device, but can't tell what those are. In all, it might supply a couple of amps if you get it running.
If the power comes in via that DB-25 connector, those pins are not rated for any type of high current.

 

Thank you mr chips , I have seen this but doesn’t talk about the psu side, but I have taken note of the author and will try to contact him..

I recently bought the receiver IF unit from eBay and I came upon the same website showing some information. I did actually email the guy who is called John and he was extremely helpful. He scanned the circuits and other info relating to the module I have. John

 

From the photo in post #1 we can see that the supply is claimed to deliver 10 volts DC and also +/-15 volts DC. What I do not see on that tag is any hint of the current capability. So it should be a good experimenter's power supply for OP-AMP circuits , and the ten volts will certainly work with CMOS digital logic.

The remaining challenge will be to locate the mains supply connections on that 25 pin connector, and discover where the mains power is connected. ARE there any other connectors on the supply??Did the information you received mention any of the connections???