ZenithT2518

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ZenithT2518

David
Phorum Expert

Posts: 1,173
Threads: 23
Joined: Jan 2014
City: Wellborn Florida

01-02-2019, 01:45 PM

Most of the failures I have seen have not been from the heaters open. The 12DT8 has a internal shield grounded to pin 9 from some reason the shield fails and will short the tube out. The 14GT8 and 19T8 just seem to fail without any warning. The 12DT8 can be replaced with a 17EW8 without changes to the tube socket. A 12AT7 can be used as a sub for the 12DT8 IF YOU MAKE A MOD TO PIN 9 of the tube socket or remove pin 9 from the tube. 12AT7 does not have a internal shield to ground on pin 9 but a tap to the heater so you have a dead short to ground your nice new tube will go poof!!! I have done the mod to the tube socket on 2 sets been happy with the results

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Messages In This Thread

ZenithT2518 - by Paul Philco322 - 11-29-2018, 12:08 PM

RE: ZenithT2518 - by Paul Philco322 - 01-02-2019, 07:55 AM

RE: ZenithT2518 - by David - 01-02-2019, 08:24 AM

RE: ZenithT2518 - by Jayce - 01-02-2019, 11:20 AM

RE: ZenithT2518 - by Phlogiston - 01-02-2019, 01:19 PM

RE: ZenithT2518 - by David - 01-02-2019, 01:45 PM

RE: ZenithT2518 - by mikethedruid - 01-02-2019, 01:57 PM

RE: ZenithT2518 - by Paul Philco322 - 01-02-2019, 08:37 PM

RE: ZenithT2518 - by Eliot Ness - 01-03-2019, 07:22 PM

RE: ZenithT2518 - by Paul Philco322 - 01-03-2019, 09:04 PM

RE: ZenithT2518 - by Ron Ramirez - 01-04-2019, 06:21 AM

RE: ZenithT2518 - by Philco444 - 01-14-2019, 02:15 PM

RE: ZenithT2518 - by Arran - 01-14-2019, 05:08 PM

RE: ZenithT2518 - by KCMike - 01-14-2019, 06:00 PM

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