Sorry, I'm not sufficiently up on this to explain, but there are folks here who can and, it is hoped, will.
However, I can state that some Z amps are "self biasing", meaning you don't need to tweak the bias after changing power tubes. Other Zs have user-adjustable biasing; with these the bias needs to be checked and possibly adjusted when power tubes are replaced. The KT-45 falls in the latter category.
Gear piled high. Talent? Must be hidden in there somewhere.
Fixed bias just means that the output tubes are being manual set and left at the optimum mA setting for safe operation. Each set of tubes may have a different optimum mA setting. So when you replace output tubes in a fixed bias amp you should check and possibly set the new tubes at a safe operating level.
Cathode bias amps use resistors and such to preset a safe range for the tubes to run in. That way you can usually grab any good tube and throw it in the amp and it will work just fine.
Jaguarguy (Mike): Hey Gary - Joe Walsh used a G12 65 in his Galaxie and it sounds great!
Mar 25, 2019 23:05:29 GMT -7
GuitarZ: So, I cranked up the privacy protection on my browsers, facebook, etc. I have to say I miss the music ads and such. I really don't need ads for watches and other random stuff. Maybe the internet knowing me isn't such a bad thing.
Mar 26, 2019 14:01:24 GMT -7
hayesgary307: hanks alot (Mike) I have been going through a Vintage 30 in a open back pine cabinet and through a Marshall 1936 C/B 2-12 I'll check and see what kind of speakers are in the 1936. I've had for a long time and I have forgot whats in it . Thanks for you help
Mar 27, 2019 12:06:54 GMT -7
Joey Beverages: hayesgary307 try a Z 210 or Z 410 with Galaxie ... also, yes the G1265 is most tasty and excellent
Mar 28, 2019 6:03:29 GMT -7
The Bad Poodle: This may be a truism... when you work in a corporate structure, the worst decisions always come from the top.
Mar 29, 2019 16:26:10 GMT -7
Lefty: The fish rots from the head down.
Apr 1, 2019 13:26:26 GMT -7
TeeDawg: Bad Poodle..........truer words have never been said. Imagine what it's like working for NASA. This ain't the nasa that went to the moon fo sho.
Apr 26, 2019 5:59:08 GMT -7
brayks: I have been absent for waaay to long. hope all are doing well!
May 1, 2019 10:19:39 GMT -7
GuitarZ: I'm okay with the AARP letters. You're still living and breathing? What the heck am I to think when a funeral home sends me a free consultation offer? Ouch!
Jun 21, 2019 15:41:26 GMT -7
The Bad Poodle: I bought airline tickets online... now every few days i get emails that read "Your trip is almost here but aren't you forgetting something?? You don't have trip insurance!" and i'm thinking..."is there something i should know about your plane maintenance?"
Jun 21, 2019 16:02:32 GMT -7
GuitarZ: Reminds me of buying my Honda. When they tried to sell me the maintenance package, I said "Is your car not reliable?" Long story short my wife teamed up with the sales lady to buy the maint package. Never again!
Jun 21, 2019 16:16:53 GMT -7