#1
|
||||
|
||||
21CYP22 vs 21CYP22A
I'm just curious as to what exactly is different between the two tube types. I've looked at the datasheets for both tubes but they seem to be identical with the exception of the tube number.
Thanks, Benny |
#2
|
||||
|
||||
From the RCA 21CYP22-A datasheet:
Quote:
|
#3
|
||||
|
||||
Thanks. I only have the Sylvania and GE datasheets in my collection...
|
#4
|
||||
|
||||
Comparing the 2 RCA datasheets shows that the heater current was dropped from 1.8A to 1.6A at 6.3Vac.
|
#5
|
||||
|
||||
Nice to know! I didn't have a clue of the difference until now, I just knew something was different from the non-A. Looks like they made the right changes to it. The one in my 7 is an "A" version, installed in 1965. It has lotsa life in it, infinite life test. It might as well be NOS. I'm glad as it is the only set that I have with a CYP, my 9 has the sulfide FBP installed 4-68.
__________________
My TV page and YouTube channel Kyocera R-661, Yamaha RX-V2200 National Panasonic SA-5800 Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20 Pioneer SX-939, ER-420, SM-B201 Motorola SK77W-2Z tube console McIntosh MC2205, C26 |
Audiokarma |
|
|