Badcaps Forums

Badcaps Forums (https://www.badcaps.net/forum/index.php)
-   Troubleshooting TVs and Video Sources (https://www.badcaps.net/forum/forumdisplay.php?f=31)
-   -   Remember the Vacuum Tube Era (https://www.badcaps.net/forum/showthread.php?t=32637)

120volts 10-29-2013 08:40 PM

Remember the Vacuum Tube Era
 
You guys Remember the Vacuum Tube Era.
No swapping out boards.
Troubleshooting to the component level.
And the thing I hated the most, 20,000 VOLTS on the CRT!!!Arrrrrrr LOL
Boy times have change. I enjoy troubleshooting to the component level.
Board swap is not as rewarding.

Well just rambling...........

budm 10-29-2013 08:47 PM

Re: Remember the Vacuum Tube Era
 
My first electronics project was 5-tube super-het AM radio at age 14.

mockingbird 10-29-2013 09:00 PM

Re: Remember the Vacuum Tube Era
 
I think you might enjoy this Youtube Channel:

http://www.youtube.com/user/joernone/videos

barryra 10-29-2013 09:35 PM

Re: Remember the Vacuum Tube Era
 
1 Attachment(s)
I collect tube radios & have a few older TV's... Zeniths are my favorite 1936-39 Philco Predicta TV's had a lot of power supply problems.

freakaftr8 10-29-2013 10:40 PM

Re: Remember the Vacuum Tube Era
 
Dont get me started. Thats my other passion. I am currently restoing an RCA CTC-16 roundie color console. And I have a 1966 magnavox color combo and a 1970 zenith color that I think has a bad yoke. But have the old sencore tube tester, crt rejuvenation unit and 3 bins full if vacuum tubes.

Lol.

goontron 10-29-2013 10:48 PM

Re: Remember the Vacuum Tube Era
 
i collect and restore valve radios and im only 16 :D
as for (C)rapy (R)adioactive (T)rash i couldn't care less if it went the way of the flppydrive!

mockingbird 10-29-2013 10:52 PM

Re: Remember the Vacuum Tube Era
 
10 years after the phasing out of CRT, and still, nothing can compare...

LCD is too slow.
Plasma is too sensitive.

I wish they'd bring back projection sets. Last I heard Mitsubishi and Pioneer were discontinuing them. The only decent TV is the Panasonic VT50/VT60 and those cost a fortune and are difficult to source outside the US. And then even if you have onw you have to be constantly vigilant that you don't leave it on a channel with a corner logo or else the image burns in.

Caleb 10-29-2013 11:12 PM

Re: Remember the Vacuum Tube Era
 
Yes I remember well at about the age of 12- I was given a tube radio left over from a garage sale. Didn't work so I took it apart and found a loose wire and got it working again. Quickly found out about capacitors too after getting the crap shocked out of me when I didn't leave unplugged for long enough before tinkering.

goontron 10-29-2013 11:19 PM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by Caleb (Post 386258)
Yes I remember well at about the age of 12- I was given a tube radio left over from a garage sale. Didn't work so I took it apart and found a loose wire and got it working again. Quickly found out about capacitors too after getting the crap shocked out of me when I didn't leave unplugged for long enough before tinkering.

my current project has a boost circuit that bring up the voltage to 375v, imagine getting hit by that:o: on the otherhand the cap belongs in the Good capacitor thread so i cant complain to much......

LOL. notice my sig in my first post!

freakaftr8 10-29-2013 11:25 PM

Re: Remember the Vacuum Tube Era
 
Gettin whacked by flyback in a '68 zenith brings back memories. Fear rhe the red anode cap. Lol

johnboy1313 10-30-2013 06:11 AM

Re: Remember the Vacuum Tube Era
 
freakaftr8, do you have any pictures of the projects you're working on? A friend of a friend found out I work on TVs and asked if I could help him get some older TVs working. I know nothing about them but that they'll kick your butt if you're not careful.

freakaftr8 10-30-2013 10:23 AM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by johnboy1313 (Post 386355)
freakaftr8, do you have any pictures of the projects you're working on? A friend of a friend found out I work on TVs and asked if I could help him get some older TVs working. I know nothing about them but that they'll kick your butt if you're not careful.

im sure I could take some pics. What are you worjing on and whadda wanna know?

truep 10-30-2013 10:31 AM

Re: Remember the Vacuum Tube Era
 
My room mates bought a used RCA CTC-16 back in '70. Took us two weeks, a dot bar generator and a lot of patience to get a decent color picture. One guy would get stoned once a month and sit and watch the color snow!

johnboy1313 10-30-2013 10:38 AM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by freakaftr8 (Post 386446)
im sure I could take some pics. What are you worjing on and whadda wanna know?

Really, my post was two thoughts combined. I just wanna see pictures of the sets your working on. They sound like theyre pretty cool looking. I'm not sure what he wants me to work on. I told him I didn't work on older TVs. I don't mostly because I don't know enough about them to not hurt myself and I've heard some pretty crazy things.

freakaftr8 10-30-2013 12:06 PM

Re: Remember the Vacuum Tube Era
 
There just about taking your time and using your noggin. Lots of high voltage in there. Every chassis is hand wired and sams schematic is your best friend. By now lots of out of spec resistors and capacitors cause the strangest symptoms. Ill post some pics. Might make a new post in this.

freakaftr8 10-30-2013 12:07 PM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by truep (Post 386450)
My room mates bought a used RCA CTC-16 back in '70. Took us two weeks, a dot bar generator and a lot of patience to get a decent color picture. One guy would get stoned once a month and sit and watch the color snow!

Ah yes color snow. Rudementry demod circuits.

momaka 11-08-2013 12:23 AM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by mockingbird (Post 386256)
10 years after the phasing out of CRT, and still, nothing can compare...

Indeed.
I have yet to find an LCD with the color linearity of a CRT.

truep 11-08-2013 09:55 AM

Re: Remember the Vacuum Tube Era
 
My first HD set was an RCA 38" direct view crt. Had a great picture in HD, but crappy in SD. I think it had the best HD i have seen. It kept dying, and circuit city took it back and replaced it with a 51" Hitachi projector. That was a great set too, until it got burn in!

Clydeuk 11-10-2013 06:06 PM

Re: Remember the Vacuum Tube Era
 
Not quite vacuum tube (valve) era and will mean nothing to you guys across the pond, but I'm still looking for a 1970's 22" Philips G8 (550) my all-time favourite colour set, back when Philips was a quality brand you could trust.

We rented one in the 70's, It never once gave a hiccup and outlasted it's CRT. I remember restoring one in the 90's for someone that had taken great care of it, at that time a lot of work was needed but it was a labour of love. They don't make em like this anymore sadly :(

Sam64 03-23-2014 12:53 AM

Re: Remember the Vacuum Tube Era
 
Looking at these posts, Is making me laugh. I have many old tube TV's stored at my home. And Clydeuk, when I get a change I will check to see if I have that Philips your speaking of.

twbranch 03-23-2014 02:06 AM

Re: Remember the Vacuum Tube Era
 
I still repair and mod tube amps for musicians. I love it. Simple as hell. Fun and rewarding to finish the job. I work on SS amps too but would rather work on tube amps all day long.

Alastair E 03-23-2014 02:10 AM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by Clydeuk (Post 389971)
Not quite vacuum tube (valve) era and will mean nothing to you guys across the pond, but I'm still looking for a 1970's 22" Philips G8 (550) my all-time favourite colour set, back when Philips was a quality brand you could trust.

We rented one in the 70's, It never once gave a hiccup and outlasted it's CRT. I remember restoring one in the 90's for someone that had taken great care of it, at that time a lot of work was needed but it was a labour of love. They don't make em like this anymore sadly :(


Ah--The G8 Chassis, Remember it very well! Lost count how many I repaired in the day....
If a cust phoned to say he had a Philips--it was nearly certain it was a 520 or 550 G8 set, and we got so good at them generally repaired them in the cust home, very rarely needed to drag one in to W/S

Sometimes, You'll see a G8 on ebay--but generally stupid money.

I'm searching (and have been for years) a Philips G6.--preferably the 22" (G22K511) The predecessor to the G8 with a hybrid chassis, Valve PAL decoder, shunt-regulated EHT....
I'm saving a fairly good A56-120X CRT I rescued some years ago for it, I live in hope!

On occasion they come up but are again--Really stupid money!

keithf2 03-23-2014 02:19 AM

Re: Remember the Vacuum Tube Era
 
can you tell me where you found the New Thread Button, I cannot find it.

Ltank 03-23-2014 06:47 AM

Re: Remember the Vacuum Tube Era
 
1972 my Dad gave me a Harmon Kardom tube stereo amp and two Altec Lancing. 15" two way speakers. 106 DB SPL rated, 16 ohm speakers designed for tube amps. Very nice. Did know what I had at the time and traded them off for motorcycle parts

SteveNielsen 03-23-2014 08:09 AM

Re: Remember the Vacuum Tube Era
 
keithf2 - you have to be at the top level of particular forum for the New Thread button to show, so go to the appropriate forum your subject belongs in and start there.

Budm - one of my school projects was a 5 tube superhet AM radio kit too. Back in 1968 the whole kit cost a whopping $15. That was for an Electronics Servicing class I got to take at the community college while still in high school after completing two years of high school electronics. Fun times.

I've worked on a few tube guitar amps and still have a couple of them; a `68 Fender Deluxe Reverb. I recapped it and it had a bad reverb tank driver transformer that crackled which I replaced, and a hacked up `72 Fender Vibrolux Reverb someone chopped the top off to make it separate from the combo cabinet but it worked fine. I recapped it too of course.

With the right set of speakers the Vibrolux is a kick ass tone and sustain king, in some ways I like it better than the Deluxe tone but my Deluxe still has the crappy stock 12" Utah speaker. Unfortunately the Vibrolux is not working now. One of the output tubes shorted and toasted some resistors. I haven't gotten around to fixing it yet because I'm not playing music these days (arthritis) but I can't bear to part with it either.

The first guitar tube amp I repaired was a blonde Fender Tremolux. All the big caps in the high voltage supply blew their guts out on an extremely hot day at an outdoor concert in Modesto. Thank God for that steel "bathtub" cover over them or that splooge would have gone everywhere. That amp was also plagued by an intermittent crackling sound that turned out to be a bad solder joint for a ground connection to the chassis.

I've also got a little old Voice of Music 3 tube amp I need to find a small point-to-point circuit board for. It works as is but that board has solder tabs broken off and looks like shit.

I worked in a TV shop for a little while back in the late `70s. That was a fun job. Pure blue on a CRT became my favorite color then. I've got a HV probe, a big heavy degaussing coil and a Sencore tube tester.

PlasmaRon 03-23-2014 11:52 AM

Re: Remember the Vacuum Tube Era
 
My first TV repair was at age 14 and my father had bought a b/w console that lasted six months and quit. He moved it to the back porch and said "enough with that" and later I asked if I could have it and he said "sure.. just don't bring it back into the house. " I did bring it to my room upstairs (with help from my brother) and we kept it secret. I fixed it by looking inside and seeing one tube that was glowing blue while the others were amber. I went to the grocery story and they had a tube tester/seller and I got a replacement and it fixed it! MY brother and I secretly watched star-trek episodes at 10pm on Thursday nights and kept the volume really really low! Great memories.

Topcat 11-19-2020 04:36 PM

Re: Remember the Vacuum Tube Era
 
1 Attachment(s)
Vacuum tube sets not forgotten. Today, my Sencore CR31A CRT rejuvenator has seen the light of day for the first time in ~20yrs, reviving a 21FDP4 in a 21" Predicta I was pretty much given a couple years ago.

It took me a while to refresh myself with the instrument....but like back in the service center days, she never let me down!

A near zero emission CRT (very dark) came right back to life!!

https://www.badcaps.net/forum/attach...1&d=1605825394

YAY for bumping a very old thread!!

RJARRRPCGP 11-19-2020 05:00 PM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by freakaftr8 (Post 386261)
Gettin whacked by flyback in a '68 zenith brings back memories. Fear rhe the red anode cap. Lol

I got whacked by the spark plug wire on a gasoline lawn mower engine in the mid-1990s, LOL. (Most likely an old Briggs&Stratton 3 HP)

momaka 11-19-2020 05:22 PM

Re: Remember the Vacuum Tube Era
 
Quote:

Originally Posted by Topcat (Post 1003302)
YAY for bumping a very old thread!!

Oh, who cares!

This restoration is absolutely awesome! My hat off to you, seriously. :bow:


All times are GMT -6. The time now is 02:42 PM.

Powered by vBulletin ®
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.