Help with tubecoil

• To: tesla@pupman.com
• Subject: Help with tubecoil
• From: "Tero Ranta" <dixie@netti.fi> (by way of Terry Fritz <twftesla@uswest.net>)
• Date: Sun, 06 Feb 2000 12:17:20 -0700
• Approved: twftesla@uswest.net
• Delivered-To: fixup-tesla@pupman.com@fixme

Dear List,

I have just acquired two QB3.5/750 transmitting tetrodes. American
equivalents are for example 4-250A and 6156.

I'm planning to use them probably in push-pull mode.

Some class-C operating info:
Ua:     4000V
Ia:     312mA
Pa:     248W
Pout:   1000W
(ug1g2:  5.1)

What kind of a primary/secondary coil would best suite these tubes? I have
bad experience with candlestick secondaries. Would the Dr.Resonance
suggested 4.5:1 ratio be the best?

I'd also like to hear suggestions about what kind of parasitic/RFI
suppression to use with such a coil.

Please send your replies also to tero.ranta@bigfoot.com

Tero

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