Recapped My Predicta Tandem, I don't know what to do
Posts: 285
Threads: 27
Joined: Nov 2012
City: Tehachapi. California
After thinking about it for a while. The symptom of the grid pattern is being obscured by the rolling banding interference. I think the AC interference is getting into the video signal which is coming from the IF section. It's interesting to note the ringing (very fine horizontal lines) is riding on the AC noise.
You really need a oscilloscope to check the DC voltages for AC noise. And looking for distorted waveforms otherwise you are flying blind.
!!!!!!!!!!!!!!!!!!!RESISTANCE IS FUTILE!!!!!!!!!!!!!!!!!!!!!!
/\/\/\/\/\/\/\/\/\
[Image: http://philcoradio.com/phorum/images/smi...on_eek.gif] Chris
(This post was last modified: 01-16-2022, 03:17 PM by OZ4.)
Messages In This Thread
RE: Recapped My Predicta Tandem, I don't know what to do - by OZ4 - 01-16-2022, 03:08 PM
Users browsing this thread: 2 Guest(s)
|
|
Recent Posts
|
|
Philco 45-6365 Universal IFT Instruction Manual
|
| The Philco Parts Catalog for 1942 shows it as usable for 175 kHz, 260 kHz, and 465 kHz. The instructions will show how t...DaleHCook — 11:19 AM |
|
Stromberg Carlson 1500 Squeal
|
| Hello Rob,
I agree with you—I have one here at my house that I need to check out. It’s way over-engineered just to make...radiorich — 11:05 AM |
|
My Atwater Kent 84
|
| Well getting around to restoring my AK84. Mike was a big part in me being able to snatch this one a few years ago. I won...462ron — 10:57 AM |
|
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
|
| The engine is a B&S 23 inch cast Iron holds 2 quarts of oil. The Generator is a 4 pole 1800 rpm mine was made in 195...David — 10:51 AM |
|
Philco 45-6365 Universal IFT Instruction Manual
|
| Dale: Modified topic as suggested. It is not for a specific project. I found it in a box of stuff I recently purchased...GRG — 10:34 AM |
|
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
|
|
That looks a lot like an aircraft connector of some kind ...
That is a MIL-5015 style connector, used in a wide v...DaleHCook — 10:19 AM |
|
Philco P45-6365 Universal Transformer Instruction Manual
|
| I would suggest changing the topic from "P45-6365 Universal Transformer" to "45-6365 Universal IFT."...DaleHCook — 10:08 AM |
|
Stromberg Carlson 1500 Squeal
|
| And life just keeps getting more complicated. By dconant.
Dittos'Jimradio — 08:01 AM |
|
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
|
| That looks a lot like an aircraft connector of some kind, even if it's a U.S.N power supply. I have a book somewhere abo...Arran — 02:56 AM |
|
Plug Voltages Needed For A 1943 CRV-20130 Power Supply
|
| hello david,
I have a similar generator in my collection that features a cast iron, single-cylinder Briggs & Stratt...radiorich — 01:00 AM |
|
Who's Online
|
There are currently 1287 online users. [Complete List]
» 3 Member(s) | 1284 Guest(s)
|
|
|
|
 
|
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
