Thermionic Culture Ltd, October 2019
8
5
Servicing & Maintenance
If servicing is required within the warranty period, which is 2 years
from date of purchase (except valves which are strictly 12
months) then the unit must be returned to the supplying dealer
using the original packaging.
5.1 Valves
The only exception to this rule is in the event of a possible
valve problem. If the user feels confident changing valves,
then he/she can take off the lid by removing the fixing
screws. Assuming that the fault is with 1 channel only, valves
can be swapped in turn to isolate the fault. Try the output
valves first, then work back to the inputs (smaller ones in
cans). Switch OFF when changing valves. WARNING: Very
high voltages lurk in the circuit boards and components. DO
NOT TOUCH!
Valves fitted are usually as follows, close equivalents are in
brackets:
Input:
RTC 5654 (Mullard M8100)
Stage 2:
Svetlana EF 86 (JJ EF 806)
Output:
Tung-Sol or similar 6189 (12AU7A)
If you require spares, please contact your dealer, or
Thermionic Culture Ltd.
Before we supply spare valves we test and select them, then
“soak” them at high power for 48+ hours, then check them
again in a working unit to ensure they are still up to spec
before sending to customers.
Summary of Contents for Snow Petrel
Page 1: ......
