[R-390] C603 C606 plan "B"

[David Wise]

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of frankshughes at aim.com
Sent: Tuesday, March 24, 2009 4:27 AM
To: r-390 at mailman.qth.net
Subject: [R-390] C603 C606 plan "B"

> I was advised that Potter & Brumfield (among others) uses the same base for some of their relays.


Or any dead octal tube with the old shell-style base.


> The last problem to resolve is: what the heck is pin 5 on the socket for C603 connected to?
> It does not show up (or possibly I just can't seem to look in the correct place) in the "Y2k-REL-1" or

In Y2KR1, it's in Figure 5-24, page 5-50, filtering the B+ going to
the 0A2, V605 on the AF deck.  C603 is 30/30/30 at 300V with plus
on pins 3/5/7 and minus on pin 1, and C606 is 45/45 at 300V with
plus on pins 3/5 and minus on pin 1.  They can also be found by
"searching" the PDF, where you will also find a location
chart, Table 5-8, on page 5-55.  300V is an odd size today.
The modern replacement is 3 of 33 at 350 and 2 of 47 at 350.

Note that Y2KR1 has been superseded by Y2KR2, and Y2KR3 is
in the works.  Y2KR2, TM 11-856A, and an ENORMOUS pile of
other material can be had at http://www.r-390a.net/ .

Regards,
Dave Wise