Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

Update on 38-5 restoration, Almost ready for cabinet!
#40

So the 38-5 is largely functional on the AM band.

The only concern on the AM band is that the IF adjustments are a bit concerning. I have a fair adjustment, but the screws for item 23 (first IF can) are almost fully into the can, and the screws for item 28 (second IF can) are slightly farther out that I would have expected. This is by reference to where they started before I touched up the IF alignment.

The SW band is very flaky. Once in a while it will drop in and pass the signal along. When I even touch trimmer 5C, it may drop in for a few seconds and as soon as I bump anything it drops back out. It seems like there might be an intermittent connection. BTW, this is with a signal generator set to 17MHz and AM modulation on and coupled thru the antenna input. So what position are the switches shown on in Riders (AM or SW)? Any ideas as to how to track this down? I plan on trying to trace this using a signal path approach to see where is drops out, but I need to understand the switches before I try. Is there ANYTHING on this SW band once jet it to work with the signl generator?

Thanks,
TerryMSU


Messages In This Thread
RE: Update on 38-5 restoration, Shadowgraph question - by TerryMSU - 12-02-2016, 10:14 PM



Users browsing this thread: 17 Guest(s)
[-]
Recent Posts
RCA T62 is playing.....
Beautiful set.morzh — 09:07 PM
An attempt to remove the Field Coil from a G speaker
Well....here it is. The green stuff. Unfortunately, probably penetrates deep. I opened the top layer and saw that: ...morzh — 08:58 PM
Philco 91 Restore Code ??
:clap: :clap: :clap: :clap: Really nice workmanship!!! Top of the chassis looks great. Sorry about the long winded e...MrFixr55 — 08:09 PM
Philco 40-120C Restoration
Thank you for your reply. I will check voltages on the other tubes, look at resistor 23 and cap 25, etc. If all else fai...bluecap — 07:58 PM
RCA T62 is playing.....
Nice looking set great save. DavidDavid — 07:48 PM
Philco 89 indicator light.
Hello Jim, I have done several 89s. The trick is to move the drum in or out on it's shaft. You will need to loosen a set...dconant — 07:36 PM
An attempt to remove the Field Coil from a G speaker
MrFixr Yes, it is my plan to go with 45rpm spider if I go that far. No, the pole was not left-handed as I unscrewed ...morzh — 07:14 PM
Philco 40-120C Restoration
Change the tube. Check the tube's bias network. Are any other tubes experience the drop or just this?` Is resistor 23 OK...morzh — 07:09 PM
Philco 89 indicator light.
I forgot how the pointer is formed: could you show the way it is formed and how you tried to change it?morzh — 07:01 PM
An attempt to remove the Field Coil from a G speaker
Was that pole piece left handed ? Since the metal "spider" is toast, wonder if you can either get the "4...MrFixr55 — 06:54 PM

[-]
Who's Online
There are currently 9038 online users. [Complete List]
» 3 Member(s) | 9035 Guest(s)
AvatarAvatarAvatar

>