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

Thread Closed

Craftsman RC200 resto
#4

I did some checks last night now that I have the schematic. I checked from B+ to chassis and no shorts. Found a 20a fuse in the 3a holder - not good. I disconnected the power transformer HV from the chassis, checked again for shorts. Then stuck a dim bulb tester and amp meter in the AC line, then did a slow power up via the variac. So far so good. Current stayed around .5 amp or so and the bulb was very dim. All the tubes lit, next I checked the output from the PT. I was at 216 ac across and 107, 106 to center tap. That was at 120v on the line. Looks like the transformer has hopes. Next, (don't shoot me!) I reconnected the PT leads and did a slow power up to about 50v, then again to about 70v while monitoring the B+ and current. I also had the scope on the H output grid. Current stayed near .7a, and the DC was sitting around 107 off L1, and 50 off L2. These are the 2 main B+ sources. I let it sit for a few minutes and powered off. To the touch I had a 400v cap under chassis barely warm and one of the cans. So I know there is some leakage. I didn't observe anything starting up like the H-osc, vertical or sound. I did note that it has had some vertical circuit work done, about all of it. Looks like an osc transformer, soldering around the sync amp and possibly a vertical output transformer. Typical. What is it about the vertical section that is always so troublesome? Even into the more modern sets. Oh well, more later.

If I could find the place called "Somewhere", I could find "Anything" Icon_confused

Tim

Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44


Messages In This Thread
Craftsman RC200 resto - by TV MAN - 12-25-2018, 05:41 PM
RE: Craftsman RC200 resto - by Paul Philco322 - 12-25-2018, 06:34 PM
RE: Craftsman RC200 resto - by Arran - 12-30-2018, 05:47 PM
RE: Craftsman RC200 resto - by TV MAN - 01-06-2019, 12:29 AM
RE: Craftsman RC200 resto - by TV MAN - 01-07-2019, 12:38 AM
RE: Craftsman RC200 resto - by TV MAN - 01-29-2019, 02:22 PM
RE: Craftsman RC200 resto - by TV MAN - 02-08-2019, 01:06 PM
RE: Craftsman RC200 resto - by KCMike - 02-08-2019, 01:15 PM
RE: Craftsman RC200 resto - by TV MAN - 02-09-2019, 03:39 PM
RE: Craftsman RC200 resto - by Arran - 02-10-2019, 02:39 AM
RE: Craftsman RC200 resto - by TV MAN - 02-11-2019, 09:38 PM
RE: Craftsman RC200 resto - by TV MAN - 07-04-2019, 10:43 AM
RE: Craftsman RC200 resto - by TV MAN - 03-13-2020, 09:23 PM
RE: Craftsman RC200 resto - by TV MAN - 03-16-2020, 02:12 PM
RE: Craftsman RC200 resto - by TV MAN - 11-25-2020, 09:06 PM
RE: Craftsman RC200 resto - by MrFixr55 - 11-28-2020, 12:30 AM
RE: Craftsman RC200 resto - by TV MAN - 12-03-2020, 11:18 PM
RE: Craftsman RC200 resto - by TV MAN - 12-13-2020, 04:21 PM
RE: Craftsman RC200 resto - by TV MAN - 12-31-2020, 02:46 PM
RE: Craftsman RC200 resto - by morzh - 12-31-2020, 04:29 PM



Users browsing this thread: 2 Guest(s)
[-]
Recent Posts
Philco 71 Code 125
Looks like that might be the B- buss, so that would be correct.RodB — 01:32 PM
Philco 71 Code 125
I noticed on the code 121 schematic the center tap for the 6 volt winding and hv winding are tied together. Is this corr...dconant — 12:16 PM
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

[-]
Who's Online
There are currently 1576 online users. [Complete List]
» 1 Member(s) | 1575 Guest(s)
Avatar

>