Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

Aligning 40-155...signal bleeding in
#13

John, after working with the set on and off for a few days it seems close....better than it was. Tubes replaced, especially the mixer have made a difference. But I have a few vexing issues....after aligning the RF....attempting the 1400 and 580 Kc there is an area of microphoning of the chassis and intermittent howling at different points but all seem to be situated in the middle of the band 800-1100 kc....not sure why this would be so tight to that part of the band....that and some of the strong stations appear at other places than there assigned frequency...i.e. 830 kc WCCO appears at the far end and holds some audible signal across the whole range...stronger at some points.
Bad mixer socket perhaps? Continuity seems good on it tho without grounding where there shouldn't be...
This is a nice set ...at times when it does work it sounds great....it started as a fully packed mouse nest with many capacitors and resistors gone for mouse feeding purposes...I challenge to basically rewire but the cabinet is very nice now. Would be nice to go the last mile and get it back totally in line!
Thanks John...I'm going to send this as a message as well...sorry for the duplication but would like your input on this.
Jeff


Messages In This Thread
RE: Aligning 40-155...signal bleeding in - by jeffgniffke - 02-07-2014, 05:34 PM



Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
under chassis parts locator diagram for 1938 Zenith 9s262
Has anyone gone to the trouble of creating an under chassis parts locator image?  Yes, I can identify components by foll...bobloney — 08:57 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Try looking at this site the book mark is for a old generator that I was given. David    https://radionerds.com/index.ph...David — 08:36 PM
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
Hello Everyone, I am looking for voltage identification for all the pin positions on the socket of a CRV-20130 power su...Tonym4704 — 08:16 PM
Philco P45-6365 Universal Transformer Instruction Manual
Can anyone guide me to where this may be found?GRG — 03:00 PM
54C Complete Teardown/Rebuild
I don't think that I have encountered a 12Z3 before, curious how it uses one of those but includes a #43, which is a 25 ...Arran — 02:17 PM
HiFi (Chifi) tube amp build - but my own design.
It's the other forum. I'm also in DIY, but mostly read there. Honestly, I kinda jumped into this without much thought to...TV MAN — 10:43 AM
Philco 71 Code 125
Hello,  I am in need of a schematic for this radio. Mine has the three separate circular tube shields and a shadow me...dconant — 08:06 AM
Stromberg Carlson 1500 Squeal
And life just keeps getting more complicated.dconant — 07:57 AM
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM

[-]
Who's Online
There are currently 2112 online users. [Complete List]
» 2 Member(s) | 2110 Guest(s)
AvatarAvatar

>