Home |
Search |
Today's Posts |
#2
![]() |
|||
|
|||
![]()
On Apr 13, 6:40*pm, "Paul P" REMOVE paul @ REMOVE ppinyot .
REMOVEcom wrote: I am restoring now aligning a S-38. *Yep, all caps and resistors replaced except the domino caps and tubes tested, bias voltages with in spec. *I gave up the alignment for now. *I am having trouble aligning the Band 2 at 5mc. The oscillator just dose not want to go high enough. *Perhaps a good night's sleep will help. Questions: 1) What is the oscillator offset (add or subtract the IF freq 455) for the four bands? *Are any bands different from the others? *Broadcast is just fine at frequency plus IF (455). 2) Are the domino caps paper inside or mica? *They are NOT Micamold. *There are three of four of them. *I was going to replace them next and heat gun the coils. http://www.nostalgiaair.org/PagesByM...2/M0008862.pdf Thanks, Paul P The postage stamp caps are mica but probably not silver mica. If all the other frequencies come in the problem may be that something has shifted in the band 2 oscillator coil. Most of these coils have a couple of spaced turns to adjust the value. You will have to juggle between the coil and the trimmer. The S-38B LO is 455 khz above the signal frequency on all bands. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
G.E. Superadio II re-alignment | Shortwave | |||
alignment?? | CB | |||
Help with SP-600 alignment | Boatanchors | |||
BEWARE SPENDING TIME ANSWERING QUESTIONS HERE (WAS Electronic Questions) | Antenna | |||
SX-71 alignment | Boatanchors |