On Wed, 10 Sep 1997 20:50:03 -0500 w5hvv@aeneas.net (Rod Fitz-Randolph)
writes:
>Not sure about the 3-500ZG designation but I am referring to the
>graphite plate 3-500s.
>
>My friend, WA4VWR, needs to replace a 3-500Z in his SB-220. He
>doesn't
>believe he should just replace one single 3-500Z with a 3-500ZG but
>he wants to know,
It is usually not a good idea to mix different types/brands of tubes. It
CAN be done but the potential for problems are there.
if he replaces both of his Eimac 3-500Zs with the
>3-500ZGs, will he get less than, the same as, or more rf output with
>the exact same driving power? It's a good question that I certainly
>didn't have the background to answer.
Probably more output since the original tubes could be expected to be
down a bit on emission. In any case the difference between the amp when
new and the replacement graphites will be negligible.
>
>Is there someone out there that may have replaced the 3-500Zs in a
>SB-220
>or a Drake L4B that can answer the question for him.
Done it many, many times.
>Also, (on my own), is there only a single graphite-plate 3-500
>manufacturer
>and, if there is more than one, which one has the best
>reputation/track
>record?
Amperex is one brand. There are also now some Chinese versions which are
every bit as good at much less cost. Private E-Mail me for more info.
73....Carl KM1H
>Thank you very much.
>
>Rod, N5HV
>w5hvv@aeneas.net
>
>
>
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