Main Menu
bullet Home
bullet Forum
bullet Members
bullet Member Map
bullet HvWiki
bullet Chat Room
bullet Submit News
bullet Site Rules
bullet Archives
bullet Visits
bullet Forum
Welcome
Username or Email:

Password:


Missing Code




[ ]
[ ]
Online
  • Guests: 73
  • Members: 0
  • Newest Member: omjtest
  • Most ever online: 396
    Guests: 396, Members: 0 on 12 Jan : 12:51
Members Birthdays:
All today's birthdays', congrats!
nitromarsjipan (2024)
mb (31)
Joyeep (32)


Next birthdays
11/05 Capper (60)
11/05 cereus (73)
11/05 Mcanderson (43)
Contact
If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.


Special Thanks To:
  • Aaron Holmes
  • Aaron Wheeler
  • Adam Horden
  • Alan Scrimgeour
  • Andre
  • Andrew Haynes
  • Anonymous000
  • asabase
  • Austin Weil
  • barney
  • Barry
  • Bert Hickman
  • Bill Kukowski
  • Blitzorn
  • Brandon Paradelas
  • Bruce Bowling
  • BubeeMike
  • Byong Park
  • Cesiumsponge
  • Chris F.
  • Chris Hooper
  • Corey Worthington
  • Derek Woodroffe
  • Dalus
  • Dan Strother
  • Daniel Davis
  • Daniel Uhrenholt
  • datasheetarchive
  • Dave Billington
  • Dave Marshall
  • David F.
  • Dennis Rogers
  • drelectrix
  • Dr. John Gudenas
  • Dr. Spark
  • E.TexasTesla
  • eastvoltresearch
  • Eirik Taylor
  • Erik Dyakov
  • Erlend^SE
  • Finn Hammer
  • Firebug24k
  • GalliumMan
  • Gary Peterson
  • George Slade
  • GhostNull
  • Gordon Mcknight
  • Graham Armitage
  • Grant
  • GreySoul
  • Henry H
  • IamSmooth
  • In memory of Leo Powning
  • Jacob Cash
  • James Howells
  • James Pawson
  • Jeff Greenfield
  • Jeff Thomas
  • Jesse Frost
  • Jim Mitchell
  • jlr134
  • Joe Mastroianni
  • John Forcina
  • John Oberg
  • John Willcutt
  • Jon Newcomb
  • klugesmith
  • Leslie Wright
  • Lutz Hoffman
  • Mads Barnkob
  • Martin King
  • Mats Karlsson
  • Matt Gibson
  • Matthew Guidry
  • mbd
  • Michael D'Angelo
  • Mikkel
  • mileswaldron
  • mister_rf
  • Neil Foster
  • Nick de Smith
  • Nick Soroka
  • nicklenorp
  • Nik
  • Norman Stanley
  • Patrick Coleman
  • Paul Brodie
  • Paul Jordan
  • Paul Montgomery
  • Ped
  • Peter Krogen
  • Peter Terren
  • PhilGood
  • Richard Feldman
  • Robert Bush
  • Royce Bailey
  • Scott Fusare
  • Scott Newman
  • smiffy
  • Stella
  • Steven Busic
  • Steve Conner
  • Steve Jones
  • Steve Ward
  • Sulaiman
  • Thomas Coyle
  • Thomas A. Wallace
  • Thomas W
  • Timo
  • Torch
  • Ulf Jonsson
  • vasil
  • Vaxian
  • vladi mazzilli
  • wastehl
  • Weston
  • William Kim
  • William N.
  • William Stehl
  • Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Forums
4hv.org :: Forums :: General Science and Electronics
« Previous topic | Next topic »   

Old tvs

 1 2 3 4 
Move Thread LAN_403
radiotech
Fri Jan 21 2011, 04:15PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
 		Often when a very old set is found without a power transformer,
it may be because it burned out long ago. If the wires soing to
the 5AS4/5U4 rectifier have been desoldered this may be the case.

A TV shop, may have taken the transformer for another set. Those
sets were common in the mid 50's. The were great heavy beasts.
You often had to move them to the third floor in flats with no
elevator.
Pity that you wont get to adjust the ion trap.
Back to top
Steve Conner
Fri Jan 21 2011, 04:21PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Grenadier wrote ...

However, I hit paydirt with the radio...
It's AM/FM stereo with AFC. All tubes.

Nice radio! I agree you should save it, FM stereo with tubes is pretty high end.

I'm sure you can figure out how to adapt your iPod (or open source equivalent smile ) to the turntable input.
Back to top
radiotech
Fri Jan 21 2011, 05:25PM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
 		I'm sure you can figure out how to adapt your iPod (or open source equivalent ) to the turntable input.


Bah !

There was a reason why the photo showed a BTO record
on the changer and it is simply, playing an Ipod through
a tube amp is * gauche * .
Back to top
Adam Munich
Fri Jan 21 2011, 07:03PM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Not too hard to do seeing as the phono input is an rca jack...

Pics of radio after cleaning. It turns out there's actually a transistor in there, likely the most expensive part at the time.

1295636292 2893 FT106392 Dsc09436 1295636381 2893 FT106392 Dsc09433 1295636524 2893 FT106392 Dsc09423 1295636600 2893 FT106392 Dsc09425

I'm thinking of replacing every cap in there because the bass sounds kind of muddy.

Tubes I harvested:

GE 5U4GB Dual diode
GE 6CU6 Beam power tube
GE 6W4GT Diode
GE 6W6GT Beam power tube
GE 6SN7GT Dual triodeGE 6AL5 Double diode. (tiny!)
GE 12GA6 Heptode
GE 12BA6 Pentode
GE 6EH7 Pentode
GE 6ES5 Triode
GE 6AV6 Double diode tiode
GE 12BH7 Dual tiode
GE 6CB6 pentode
Admial 12AV6 Double diode triode x2
Admiral 6AX3 Diode
Admiral 6GE5 Beam Power Tube
Admiral 6FQ7 Dual tiode
Admiral 6JV8 Triode pentode
Admiral 6EJ7 Pentode
Admiral 6ALII
Sylvania 6SN7GT Dual triode
Sylvania 6FG7 Triode pentode6HS8 Dual pentode[/link]
?? 35W4 Diode
?? 6EW7 Dual triode
?? 6AU6 Pentode
?? 6BA7 Heptode
?? 6CB6 pentode
RCA IG3BT HV diode
Admiral IG3BT HV diode
Zenith IAD2 HV diode

I'd like to build something with them, maybe a flyback driver. I don't really know anything about tube circuits though. :-/ I know how a tube works but that's about it.
Back to top
Experimentonomen
Fri Jan 21 2011, 07:53PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
 		I always wondered how they wound those thin pancake coils and get the wire to stay in place.

I assume the wire is coated with something tacky that then holds the coil together as its dipped in that outer coating.
Back to top
radiotech
Sat Jan 22 2011, 04:23AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
 		Here is where Admiral used the lone transistor to
turn on the stereo indicator lamp. Is your lamp
circuit similar? What is the transistor number.
Can you conclude what frequency the bulb filament
current is likely to be?


1295670235 2463 FT106392 Admiral Transistor
Back to top
Adam Munich
Sat Jan 22 2011, 04:28AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
 		Yep that's what it does! The transistor is a R593A.
Back to top
Nah
Sat Jan 22 2011, 03:05PM
Nah Registered Member #3567 Joined: Mon Jan 03 2011, 10:49PM
Location: USA, 1960s
Posts: 260
 		You should look up old TV books. They will give you a circuit for a VT Flyback driver.
Back to top
Steve Conner
Sat Jan 22 2011, 03:47PM
Steve Conner Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
 		Or try my tube version of the single transistor flyback driver. Link2
Back to top
Avalanche
Sat Jan 22 2011, 04:41PM
Avalanche Registered Member #103 Joined: Thu Feb 09 2006, 08:16PM
Location: Derby, UK
Posts: 845
 		if you're prepared to use all of those tubes in one go, you could probably build some kind of TV tongue
Back to top
 1 2 3 4 

Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob

Go to:

Powered by e107 Forum System
 
Legal Information
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.