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.
Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
Quick questions on tube datasheet pinouts- I was looking at the 6KG6A datasheet here: and noticed that the grids and screens have 2 connections on the pinout (1,8; 3,6; 2,7;) How should these be connected? Do I only need to connect to one of these two pins for each connection? For example- If i wanted to connect to g1, i would use either pin 1 or pin 8, but not both?
Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
There are three separate grids. You can put three different voltage potentials into this tube. 1 & 8 would be one of them: say, 120v to 1 and grnd to 8. This would be one current path. You will need another voltage source for the other pairs. By varying the different voltages you control the deflection.
Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
For my 211 tube tester the filament transformer has a center tap and this serves as the ground for the whole system, isolating it from the earth's ground. The plate and grid grounds go to this. However, using the earth ground is acceptable as long as this is the common ground for everything. On pin will get the voltage potential, and the other will be grounded. If you use all three grids then there will be three grounds.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I completely disagree with Iamsmooth. To me that diagram says that the pairs of pins are connected internally, which means you can use either pin or both.
You might want to use both pins in RF amp applications where you want to minimize stray inductance. The 6KG6A was also popular in cheap and nasty ham/CB linear amps, maybe for this reason.
Registered Member #105
Joined: Thu Feb 09 2006, 08:54PM
Location:
Posts: 408
Steve, I think I agree with you- if one of the "end's" of the screen was grounded (say pin 8), if I apply 90V to one side of a grid (say pin 1), the screen is gonna burn up, plain and simple.
Registered Member #190
Joined: Fri Feb 17 2006, 12:00AM
Location:
Posts: 1567
I don't have a pentode to try, but if pins 1 and 8 are both connected to the grid/screen (a short with an ohm meter) then only one is connected to the voltage source; the other end of the voltage source is grounded. Sorry for the confusion on my part.
Registered Member #508
Joined: Sat Feb 10 2007, 01:57AM
Location: London, Ontario, Canada
Posts: 6
About 6KG6 / EL509 vacuum tube. This is a power pentode , 9 pin magnoval base, anode (plate) is connected to tube cap. Each of the three grids in this pentode are provided with two connecting pins on the tube base. This is because in the old days, most tube circuits were wired point to point using terminal strips and components were quite large. A tube grid often had many components attached to it and more than one pin made connecting to a grid easier. I remember this from scrapping huge old tube TV's for parts in the early 1970's (I'm old...) This tube was popularly used as the horizontal deflection amplifier in color TV's of the early 1970's. Your web datasheet does not agree completely with my copy of RCA RC-29 1975 Receiving Tube Manual. If you want a copy of pages 341 and 342 as relating to this pentode, I could scan the pages and email you if you need. PM me if this would help with your design. On this tube, only apply the needed grid voltages, ie for grid 2 you provide 160v by pin 3 connection, do not ground pin 6, which is the other grid 2 connection. This would only short out the grid 2 supply. I can't offer much more help as I am only an old hobbyist, I am not a designer or electronic engineer.
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.
Tube Pinouts
