Tube Info...

[petemoore]

Today's need is for info on a 6CG7 tube...wiring, power supply needs, anything related to using this at lower power supply levels...like 30VDC.
 I went on a house tube search [here], found this one, still looking for the 'gold mine' bag with probably 15 tubes in it...gotta be here somewhere...
 I searched around in google and related links, and found ample suppliers, devices for sale that use this tube etc. but no actual info about, or .schematics using. this tube...
 Also I found...old british 7025, a couple EL84's, and what looks like [no #'s left]a 12AX7. I'm wondering most about the 7025, and 6CG7...
 Update...I put the United Electronics 7025 in the circuit, works good, more distorted and less round than the Ampex 12AX7, less distance physically between the top and bottom plate on the 7025.
 I'm prefering the rounder sounding Ampex ^.

[Peter Snowberg]

Well to start ou here's the datasheet:
http://www.mif.pg.gda.pl/homepages/frank/sheets/093/6/6CG7.pdf

I don't see anything in the official data for <90 volts except the plate curves which show a severe kink in the low voltage operating area. That might give it a really cool tonality or it might sound poor. You'll have to tell us.

Take care,
-Peter

[Paul Marossy]

There is some data sheets on that tube here:
http://www.triodeel.com/tubedata.htm

[Lonestarjohnny]

Check out a Magnatone Amp, they used them all the time, and Pete, if your gonna play with tube's, Invest in a RCA recieving tube Manual, somewhere on line there is a copy floating around,
JD
Artist Formerly Known as John Davidson
:lol:  :lol:  :lol:  :lol:

[Ansil]

 I searched around in google and related links, and found ample suppliers, devices for sale that use this tube etc. but no actual info about, or .schematics using. this tube...

http://hereford.ampr.org/cgi-bin/tube?tube=6CG7





Data Source and Substitute Data

Data
Data Source ................................... RCA RC-29 - 1975
Prefered Substitutes .......................... None
Substitutes ................................... None


Application
Miniature type used as combined vertical and horizontal-deflection oscillator in color and black-and-white television receivers. Requires miniature 9-contact socket.

Mechanical Data
Bulb .......................................... T-6 1/2
Base .......................................... Smal Button 9-Pin
Outline ....................................... 6-3
EIA Base ...................................... 9AJ
Mounting Position ............................. Any


Electrical Data
Heater Characteristics
Heater Voltage ................................ 6.3 Volts
Heater Current ................................ 0.6 Amperes


Direct Interelectrode Capacitances (approx)
Each Triode
Input ......................................... 2.3 pf
Output ........................................ 2.2 pf
Grid to Plate ................................. 4.0 pf


Maximum Ratings (Design Center Values)
Each Triode
Plate Voltage ................................. 330 Volts
Plate Dissipation ............................. 4.0 Watts


Characteristics and Typical Operation
Class A Amplifier
Plate Voltage ................................. 250 Volts
Grid No. 1 Voltage ............................ -8 Volts
Amplification Factor .......................... 20
Plate Resistance (approx) ..................... 7700 Ohms
Transconductance .............................. 2600 MicroMhos
Plate Current (Zero Signal) ................... 9 Ma.


Class A Amplifier
Plate Voltage ................................. 250 Volts
Grid No. 1 Voltage ............................ -12.5 Volts
Plate Current (Zero Signal) ................... 1.3 Ma.


Class A Amplifier
Plate Voltage ................................. 90 Volts
Grid No. 1 Voltage ............................ 0 Volts
Plate Resistance (approx) ..................... 6700 Ohms
Transconductance .............................. 3000 MicroMhos
Plate Current (Zero Signal) ................... 10 Ma.



--------------------------------------------------------------------------------

Searched 20013 records on 3620 tubes, 1 match.


looks like i was a little slower on the response.

[Ansil]

Invest in a RCA recieving tube Manual, somewhere on line there is a copy floating around,
JD
Artist Formerly Known as John Davidson
:lol:  :lol:  :lol:  :lol:

i have one of these if anyone wants it..

http://diystompboxes.com/sboxforum/viewtopic.php?t=21931

[Jim Jones]

Hey Pete,

The best one-stop online "shop" for tube data is www.duncanamps.com - definitely worth bookmarking.

Jim

[Peter Snowberg]

Go to Duncan Amps and download TDSL - the personal edition. It's a goldmine!

http://www.duncanamps.com/tdslpe/

Take care,
-Peter

[Lonestarjohnny]

Hey Peter, I thought all the Goldmines were in Calf.   :shock: :?  :?  :?
JD
Artist Fomerly Known As John Davidson

[petemoore]

Alaska and Colorado also had their respective gold rushes.
 My brother brought me a piece from Skagway, according to historical references, this valley, when originally viewed in it's 'natural state, [before the hourdes arrived to stake claims and make off with it], the entire valley and river gleamed with gold nuggets of various sizes.