[R-390] R390A RF deck resistor and slugs

[Larry H]

Hi Nelson,  That stuff is kind of crammed in there, but I think your looking at the wrong R228.  I think your looking at R210 on the 1st crystal osc.  Any way, in my Stewart Warmer, both are as the schematic shows (R228 = 56k and R210 = 5.6k).  

Good news on the tuning slugs.

Regards, Larry


________________________________
 From: "ngietz at mymts.net" <ngietz at mymts.net>
To: R390 <r-390 at mailman.qth.net> 
Sent: Thursday, January 22, 2015 10:37 PM
Subject: [R-390] R390A RF deck resistor and slugs
 

Hi all,
    I’ve been attacking out-of-spec resistors and caps in this Teledyne RF deck with soldering iron, head magnifier, forceps, and dental picks with pretty good success so far.  But I’ve landed on a mystery in this enigma.  In the Cal. Osc. section on V205B, the R228 resistor off anode pin 6 is 56K.  (It ohmed out at 62-point-something thousand, so has to come out regardless.) The schematics and all the parts lists I’ve found specify 5600 ohms, a tenth of what’s there.  An orange band for red is probably an easy misread on the assembly line.  Should I follow my instincts and put in 5600?
    Also, an answer to one of my previous questions, about some RF slugs I received with brass slot-head screws instead of the Bristol spline heads.  Phil at Fair Radio says these must be for an R388 or –390, so I put it down to a miss-order, and some correct slugs are on their way.
    But what’s your advice on R228?
    Nelson Gietz
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