|
#1
|
|||
|
|||
Mine did NOT have the mini manual.😡☹️ I’m going off of memory on the CRT, so I could be wrong on the number. It’s also entirely possible this isn’t the original tube, as I bought it restored from a guy who says he was an authorized service technician when these were on the store shelves. I’m familiar with 12ax7’s and the like, compactrons are new territory for me.
|
#2
|
|||
|
|||
Based on the tube lineup, your set is not the H1 chassis, the earliest model. I had the H1 chassis and it had different HO and damper tubes (12GE5 and 12AX3).
My set developed a heater-to-cathode short in one of the CRT guns. Since there was already an isolation transmission transformer in the CRT filament circuit, I simply removed the 220K resistor tying the CRT filament to +145V. Later on, I came across the later version CRT (11WP22) and replaced the 11SP22. The improvement was quite noticeable due to the smaller dot size of the 11WP22. |
#3
|
|||
|
|||
I may add the tube lineups to my spreadsheet for each chassis, if anyone thinks it's worthwhile.
|
#4
|
|||
|
|||
User181, anything you do is helpful to me. I can poke around a tube amp, but I’m just getting my feet wet in tv.
|
#5
|
|||
|
|||
Got another clue; mine looks identical to a ‘72 model another member here sent me a photo of.
|
Audiokarma |
#6
|
|||
|
|||
Quote:
Yea. Consider Compactrons to be the electron tube equivalent of a silicon integrated circuit chip, in a way. Loosely equivalent in principle. |
#7
|
|||
|
|||
It’s just gonna be awhile before I have the numerics down. I can tell what a gz34 or 6973 does off the top of my head. Been reading up on concepts I didn’t need to know before like convergence and sync too. Thanks to a pm here I have another working set on its way to me; you guys are great! Keep the good stuff coming.
|
#8
|
|||
|
|||
Quote:
|
#9
|
||||
|
||||
There were/are some compactron based audio amps, but not many.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#10
|
|||
|
|||
Weren't you thinking of Novar based tubes, 7868 RCA's answer to the 7591?
|
Audiokarma |
#11
|
||||
|
||||
Possible, I tend to think of all (non-octal) tubes of that diameter as compactrons irrespective of their pin count. The one vintage amp I saw was in an organ...I don't remember the number and never pulled the tube.
Audiophiles are making amps with compactrons now as a way to use cheaper tubes.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
#12
|
|||
|
|||
Since the conversation has shifted focus to compactrons, I guess now is the time to ask. Can you guys recommend a compactron tester I could find easily on fleabay? If one tube goes bad I don’t want to do the Christmas light trial and error thingy. Series string isn’t something you typically see on the hifi side.
|
#13
|
|||
|
|||
Quote:
Re: the tube checker! A Sencore Mighty-mite or other modern tube checker that has Compactron and Novar sockets would do fine. I bought a full compliment of tubes for my PortaColors, except the 12JF5 for a buck each from ESRC, dollar-days list. For the damper tube I use a 19CG3 instead. It's a better tube and two extra volts in the heater string is better. |
#14
|
||||
|
||||
Quote:
|
#15
|
||||
|
||||
My B&K dyna-jet 606 has served me well on everything octal and newer.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
Audiokarma |
|
|