Crosley Model ??

[Doug66]

I picked this up on ebay earlier this year and decided to hold it for a winter project. I'm between projects now and am off work this week, so I thought I'd at lease assess it. I have done a power up and get static in the audio but no raster or signal neither on TV or FM.

Anyway, there is no model # on the set. I see a similar looking set on the ETF database. Does anyone know what model this is. I'd like to look at the schematic before pulling the set from the cabinet.

Thanks
Doug

[Kevin Kuehn]

Looks like one of the 9-403 variety.

http://www.earlytelevision.org/pdf/c...403-rider3.pdf

Unfortunately that Riders scan is very difficult to read. It should also be in
Sams 79-4

[Doug66]

You're right Kevin, the Riders posted is hard to read. Maybe I can locate a Sams, which I'd rather use anyway.

So far, I've removed it from the cabinet and found it caked in dust EXCEPT for the octal tubes which I assume are or the horiz and vertical and rectifier. Those are perfectly clean which makes me think someone tried to work on it and gave up after replacing some tubes. I haven't turned the chassis over yet to look underneath.

[Electronic M]

That likely is a Crosley badged Dumont chassis.

[Doug66]

Well I just finished familiarizing myself with it underneath, and it looks to be unmolested. It looks like all the aps are the original ones. I am going to carefully start replacing the paper caps and check the CRT. The base is loose, so I'll need to re glue it.

One thing I do find odd, is that it does no have a Hi and Lo switch for the TV tuner like other continuous sets have, just a TV and FM position.

[Kevin Kuehn]

Doug, pm me your email and I'll try to send you a scan of the Sams later tonight. Will also send it to the ETF so it can be downloaded.

[Radiotronman]

Yep, I believe Kevin is right.

[oldtvsandtoy]

I have the same set in blonde if any buddy want to make a offer on it let me know.

[Phil Nelson]

Originally Posted by Doug66

One thing I do find odd, is that it does no have a Hi and Lo switch for the TV tuner like other continuous sets have, just a TV and FM position.

If it's a DuMont RA-103 clone (or near-clone), that wouldn't be surprising. My RA-103 doesn't have Hi-Lo switches for TV channels, either.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[Doug66]

I was up around 2AM this morning replacing paper caps. I've got about half of them done. I haven't done any electrolytics yet because I've got to order most of them.

The good news is I now have high voltage. The fuse in the damper circuit was open, and I just replaced it and the results are shown. Also both candohms are good.

The bad news is my 10BP4 is not usable. I put it on the checker, and it barely had any emissions. I accidentally bumped the connector, and the socket cap came off. Trying to repair that resulted in a lead breaking off right at the glass. I'll have to locate another CRT when restoration is near completion. Right now, I've got my 5" test CRT in place.

I still can't get a signal to come thru either on TV or FM.

[Doug66]

I wanted to give a progress report. I just finished restuffing the last electrolytic can (4 cans total). I've got 2 tubular electrolytics to replace still. One is in the audio section, and one is a filter in the focus coil network.

All I can get is a horiz line across the screen. I've replaced all caps and most resistors in the vertical circuit. I was hoping this last electrolytic can would solve that as 2 sections were tied into the vertical.

I am now getting an audio signal, but it is way off on he continuous tuner. Ch 3 (cable) is coming in below channel 2. The FM band is coming over the TV band starting around Ch 5. Nothing is coming through with the band switch in the FM position.

I hope the tuner is not out of alignment. I read the alignment instructions today, and the Sams said the tuner is so difficult to align that it recommends replacing the tuner instead of realigning it.

Right now, I need to concentrate on the vertical section and try to get an image on the screen.

[David Roper]

It's more like a quasi-clone of a Du Mont. Du Mont never offered any set with a 10" screen, nor in that particular configuration. But yeah, Du Mont engineering slightly re-envisioned.

[David Roper]

There is no intercarrier, so that can't be the source of the buzz. Are you using a balun? Try connecting the 75 ohm coax directly.

[David Roper]

Did you try it yet?

[Doug66]

Yes, it didn't help. Today I'm gonna put the signal tracer on the set staring at the grid of the 1st IF tube and see what I can find.