Question about Audio Players & Recorders
Have you checked the HT fuse. the amp has 2 power supplies, one for the tube heaters, and another for the actual operation of the amp. Check that fuse, and replace with exactly the same type if blown. If it keeps blowing fuses, then you may well need to change your output tubes. They don't last forever, and you will get about 6 months out of them in normal gigging/rehearsal use, longer if you don't use the rig at high levels. Be sure also to use a proper speaker lead, not just an instrument patch lead, poor connectivity from anything that is not heavy duty can cause your amp to blow fuses, AND pop valves. I am happy to talk more to you about it, I have had a long love affair with valve amplifiers, both building and repairing them.
Posted on Nov 09, 2008
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Posted on Jan 02, 2017
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The hot surface igniter will not come on - check igniter with a ohm meter,
you should have continuity through the glow bar, the glow bar can also
crack = new igniter time. The glow bar comes on but the main burner will
not light - you should have an amp probe
to check properly, but often this is a hot surface igniter problem. The
hot surface igniter often looses it's ability to get hot enough to open
the gas safety valve. The safety valve can fail, but most times it is
just a bad hot surface igniter. The hot surface igniter can also quit
part way through cooking , in other words the oven may cycle a couple of
times and then it just sits there with the red glow from the igniter.
See this service sheet
for the proper way and amp readings for the hot surface igniter system.
Hot surface igniters do weaken and will eventually generate less heat
than they normally could. When this happens they can still allow
marginally correct current to flow to the oven gas valve for it to open
but not get quite hot enough to ignite the gas burner immediately. When
this happens, gas released into the oven can sometimes build up to the
point where when finally ignited, the amount of gas lit can cause a
small explosion inside the oven or cause an odor of gas with out the
oven working. Yes, your glow bar igniter can glow orange-red and still
be bad!! How a common gas valve works - click here.
Let me know,if needed further assistance.
Hope i helped you.
Thanks for using ' Fixya ' and have a nice day!!
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