motorola 9T1
 

Won this at an auction paid 40 for it. Had to drive 90 miles to pick it up, will be my first restore attempt on a television set, have did many radios and decided to more up. Cleaned up nicely now to order the caps. Also got the glass ballast tube on order. Glad to have found this forum.
http://showcase.netins.net/web/irc2535/DSCF0228.JPG
http://showcase.netins.net/web/irc2535/DSCF0236.JPG

Kewl ! GREAT job on the Bakelite-What did you use ?

Used toothpaste with a Sears mouse polisher, then two coats of wax. Having a hard time finding some of the electrolytic caps. How close do they have to be? Mainly the 140 and the 120.

I've used Meguier's Body-Scrub, & then a couple coats of their pure carnauba wax...Used the Applicators that are attached to the ends of my arms...(grin)

I liked your set so much I just bought one! I paid $51 off ebay less than five minutes ago sight unseen. Hope the CRT is good! I probably won't start restoration right away (working on 2 already). I'm open to sharing any knowledge, resources or whatever!

Nice looking set! You were wise to pick it up semi-local. I had one shipped and it arrived in pieces.

John

Only about 15 miles away. I'm picking it up tomorrow night. I will try and get more pictures up next week on all my sets.

Aw, you outbid me :(
Seriously though, I'm glad you got it. I already have one only it has a piece of bakelite missing around the screen.

I used these Nichicon caps from Mouser Electronics. I like going a little higher in the voltage rating for extra headroom.

120uF @ 400v (mouser part# 647-UPZ2G121MHD6)
150uF @ 200v (mouser part# 647-UCS2D151MHD)

P.S. I think your set came with the knobs for the wood 9VT1 version. They should look like this
http://farm2.static.flickr.com/1308/...ee31a2829a.jpg

I agree knobs are not stock. I believe this may have been a repair shop error or factory error. Are they catalin? I started the cap replacement tonight, checked the tubes last night and had 4 that needed to be replaced. Had all but one on hand. Long process but it will be worth it.

Mine are like Bandersens above. The small knobs are a red plastic with a little brass colored metal insert. The big clear one for the channel tuning is just clear plastic. There is an auction on ebay right now for a whole set. I need one and am going to be bidding pretty hard. Your welcome to the rest if I do win. If you are going to bid I would ask that you please just let me know. There is no reason we should start a bidding war between us. LOL

I double checked and if I were to win, I would use whats in the auction and have a set with one insert missing. The channel indicator knob would also have to be touched up because the numbers have faded. Just an FYI.

I'm already bidding on those but only need one of the red knobs and have no desire to get into a bidding war with you guys either. I already have a couple spare channel knobs if either of you are interested you can have them. Also, those recessed numbers are easy to bring back to life with a little black lacquer stick paint.

P.S. I don't think there's anything wrong with using the knobs you have. After all, they are a complete set of Motorola knobs from a very similar model.

With a good cabinet, it may be possible to make a mold of that face now so Banderson can reconstruct the face of his shattered Moto.

I'll give up my cabinet for a while if Bob is interested. I won't be able to do much with it until I get the chassis up to snuff. I already have the chassis out so it would be a no brainer, just take out the speaker. The fabric isn't the best either. Bob just P.M. me if your interested, I could probably even deliver it, I'd like to see your collection some time anyways. Ok who wins the ebay auction? Obviously we can all go our own way and pay way too much or we can figure it out here. I will settle for for an insert only if we can make this work. I also may want help hand lettering the knob. My hands are shaky as hell and that is something I have to get someone else to do. Usually I give that kinda stuff to my wife LOL. Any suggestions? Does Lynyrd want the knobs too?

With electrolytic capacitors, you can use the same (or somewhat higher) value for capacitance and voltage. Don't go lower. Don't go crazy. For example, replacing 20 mfd with 22 is fine; replacing 20 mfd with 100 is silly.

http://antiqueradio.org/recap.htm

Regards,

Phil Nelson

I'm only interested in one of the red knobs. Even then it's for a project I might not get to for a year so no big deal. That being said, I'm currently the high bidder. So one of you guys will either need to outbid me (or someone else) or let me try to win and I'll mail out the knobs to who ever needs them.

Ok now I got the paper caps replaced, what should I do about the Selenium Rectifiers? I know they should be replaced with diodes but I have no clue what they should be. Kind of a newbie at this TV stuff. I saw the article by Phil but there was not enough information as to what diodes and a good close-up of the process. Any help would be appreciated. No I do not plan on bidding on the knobs and will wait until I decide if they are that important right now they are not.

1N4007 diodes are a great choice. They can handle 1000 V at 1 Amp. More than enough for this set and they're cheap :)

I've been outbid on the knobs so I'm out of the running.

I have some GE 510's 1000v 2.5A and some D-6's on hand not sure what they can handle.
Also an IRC d5 dual diode and an IRC d4 dual

Bob,
Have you had to add a resistors in with that 1N4007's to bring down the voltage or is just throwing in the diode been working out? Have you done anything different on any of your Motorola sets?

I didn't use any series resistors in any of my sets after reading that others hadn't either. My B+ is a few volts higher than called for, but they all for fine.

It certainly doesn't hurt to add one though. Something around 50-100 ohms at 5W in series with each diode should work fine.

I was wondering about the resistor too. Read where a lot say to do it but I see Phil never did it on his. I picked up some rectifier diodes at radio shack, 1.5A 1000v. Appears they should do the ticket.