I was just curious.
Is there any merit these
Time Delay Boards that I see offered?
Thanks Scott
Is there any merit these
Time Delay Boards that I see offered?
Thanks Scott
2 posters
Time Delay Board
scott6058- Posts : 37
Join date : 2009-01-21
Bob Latino- Admin
- Posts : 3274
Join date : 2008-11-26
Location : Massachusetts
Hi Scott,
There may be some benefit of a time delay device if you use an amp with a solid state rectifier. If your amp uses a GZ34 rectifier, however, then IMHO a time delay board is not needed. The GZ34 rectifier tube is indirectly heated and needs about 15 seconds or so to warm up before it applies any high voltage and when it does apply the high voltage DC > it comes up slow. By that time the tube heaters are all lit. Any time you use a GZ34 rectifier you have a "built in time delay".
If a 5U4 rectifier is used the high voltage comes up a little faster because a 5U4 is directly heated but even a 5U4 (or for that matter almost any tube rectifier) won't apply the high voltage instantly like a solid state rectifier.
That said, Dynaco used solid state rectifiers in both the ST-35 power amp and the SCA-35 integrated amp with no time delay and many of them are still working fine.
Bob
There may be some benefit of a time delay device if you use an amp with a solid state rectifier. If your amp uses a GZ34 rectifier, however, then IMHO a time delay board is not needed. The GZ34 rectifier tube is indirectly heated and needs about 15 seconds or so to warm up before it applies any high voltage and when it does apply the high voltage DC > it comes up slow. By that time the tube heaters are all lit. Any time you use a GZ34 rectifier you have a "built in time delay".
If a 5U4 rectifier is used the high voltage comes up a little faster because a 5U4 is directly heated but even a 5U4 (or for that matter almost any tube rectifier) won't apply the high voltage instantly like a solid state rectifier.
That said, Dynaco used solid state rectifiers in both the ST-35 power amp and the SCA-35 integrated amp with no time delay and many of them are still working fine.
Bob
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