Alignment Question

Thread Rating:

0 Vote(s) - 0 Average
1
2
3
4
5

Linear Mode

Alignment Question - 46-1213

wakani
Junior Member

Posts: 23
Threads: 12
Joined: Oct 2011

12-29-2011, 11:28 PM

Sailing along, down to the final stages, after re-capping I set out to align the set. Have a B&K SigGen, Frequency Counter, O'scope and VTVM.

First problem, the AM alignment, was with the 2nd IF transformer, TC402A. I can get no change in output from the transformer, regardless of how much I twist it. Trimmer C402A works fine, sensitive but not overly sensitive. Next on in squence was TC 400A, slight change in output but not near what I thought it should be.

Shortwave works fine.

AM is feeble

FM work fine.

Any ideas? Bad/gassy 7B7 IF amp?

Find

« Next Oldest | Next Newest »

Messages In This Thread

Alignment Question - 46-1213 - by wakani - 12-29-2011, 11:28 PM

Re: Alignment Question - 46-1213 - by LASJayhawk - 12-30-2011, 12:44 AM

Re: Alignment Question - 46-1213 - by 7estatdef - 12-30-2011, 08:48 AM

Re: Alignment Question - 46-1213 - by wakani - 12-30-2011, 01:57 PM

Re: Alignment Question - 46-1213 - by 7estatdef - 12-30-2011, 09:48 PM

Re: Alignment Question - 46-1213 - by wakani - 12-30-2011, 11:01 PM

View a Printable Version

Users browsing this thread: 1 Guest(s)

Recent Posts
Philco 46-420 Code 121 Reception issues
Welcome Eric, I agree with Bob and far as the two main electrolytic filter capacitors did you change them yourself or w...radiorich — 11:43 PM
Philco 46-420 Code 121 Reception issues
You mentioned the Philco manual and going through the check points...just to be sure we're on the same page here's the m...klondike98 — 08:13 PM
Philco 42-1008 conversion kit
Interesting. I haven't seen that before.klondike98 — 07:02 PM
12' Philco
Yes I had looked for it on the web as well some time back and could not find it. I was glad to see it turned up in Ron'...klondike98 — 06:59 PM
Shadow Meter Bulb
Now if you had a set with a tuning light then the bulb type is important to the circuit, some sets used those prior to t...Arran — 04:58 PM
Shadow Meter Bulb
Ok. Thanks for the correction.RossH — 03:09 PM
Model 28L
For 28 you will probably need to buy a Hammond 125CSE. Or any of the series of the power you need, with SE suffix. Then ...morzh — 02:09 PM
37-60 revision 6
I am restoring a Philco 37-60 and it shows run 6 they removed the ground from G3 of the 6K7G and put the G3 to -2.5v for...bobbyd1200 — 01:01 PM
Shadow Meter Bulb
Mike is correct on the bulb connection, two separate circuits. I found that by rotating the bulb and sliding it forward ...RodB — 12:19 PM
Hickok AC51 tube tester
Cleaned ann contacts, switches and sockets, works great now.martinj — 11:32 AM

Who's Online

There are currently 5889 online users. [Complete List]
» 1 Member(s) | 5888 Guest(s)

Login
Username:
Password:	Lost Password?
	Remember me