On 10/2/2010 7:28 PM, CSM(r) Gary Huber wrote:
It seems to me there are several different lamp supply voltages depending
upon the build date and the version of the 425 in question.
I have 28 VDC replacements for my early Titan (S/N 425-00516) which was
export model and I believe the lamps in my Titan 425E are in parallel.
That's right -- it depends on the vintage of the Titan 425. All use two
bulbs, but some versions use two 12V-14V bulbs in series and others use
28V bulbs in parallel. You'll need to open the amp up and look to see
which version you have.
BTW -- there are 425 schematics (about 95% complete) on my website as
pdf files. I've not drawn the details of the various resonant circuits
(which also vary with vintage).
http://audiosystemsgroup.com/publish.htm
73, Jim Brown K9YC
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