[Test-Equipment] Heathkit PS-4 or IP-32 Manual

[Ron]

> ... a Heathkit PS-4 high-voltage power supply, which is electrically identical to the IP-32 ...

... which is also identical (or almost) to the IP-17-- though not mechanically. 


To check for assembly errors, it's actually easier to work against the schematic, 

rather than the instruction manual. The circuit is pretty simple. 

-- Ron




>________________________________
> From: eric lemmon <wb6fly at verizon.net>
>To: 'Discussion of Electronic Test Equipment' <test-equipment at mailman.qth.net> 
>Sent: Saturday, July 6, 2013 10:50 AM
>Subject: [Test-Equipment] Heathkit PS-4 or IP-32 Manual
> 
>
>I am trying to repair a Heathkit PS-4 high-voltage power supply, which is
>electrically identical to the IP-32 unit.  I have the schematic diagram, but
>I have been unable to find an assembly manual.  I did find a partial manual
>online, comprising only 8 pages, but the complete manual has at least 26
>pages.  My intention is to verify that the unit was properly wired by the
>original owner, and having the step-by-step instructions will be very
>helpful.
>
>If any member of this list has a clean and complete original hard copy of
>the PS-4 or IP-32 manual, I would like to borrow it for full-page scanning
>into PDF by my local graphics house.  Your original will be returned to you,
>along with a CD containing the PDF file.
>
>When I first tested the unit, both C4 and C6- 20 uF 450 VDC electrolytics-
>were leaking, and C6 ruptured.  I replaced both with new capacitors (at $17
>a pop!) but the unit still does not work properly.  Major clue: The new C6
>gets very hot, very quickly.  All tubes check good on my TV-7A/U tester, and
>the four M150 silicon diodes check good.  I am thinking that a very high
>amplitude ripple will heat up a filter capacitor, so my next step is to test
>or replace the two 70 uF 350 VDC capacitors C2 and C3.  Another clue:  When
>the pots are preset per the note on the schematic diagram, I measure +135
>VDC on the cathodes of the 6L6 tubes, rather than the +40 VDC specified.
>Yes, I am using a 20,000 ohms/volt analog meter!
>
>If any reader has encountered similar problems with a Heathkit PS-4 or IP-32
>power supply, please respond.  Thanks!
>
>73, Eric Lemmon WB6FLY
>
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