Thanks Tony,
OK 19 dB or so, sounds nice. Yes its a nice tube,
time to retire the old 4-1000A bottles.
As I said it will be a simple swap. I already have
two 7.5 V fil transformers in the box, just have
to run them in series, input Z is close to what
2x4-1000A has and it just needs a tweak, I already
feed the 4-1000s with a big 3-phase power supply,
means I can run the YC-156 at a nice level.
73 Jim SM2EKM
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Tony King - W4ZT wrote:
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I have several friends running the YC-156/179 GG, cathode driven with tuned input. With anode voltages of 5500 to 6500 they observe power gains upwards of 19 dB. As you reduce the plate voltage drive requirements go up but at the higher voltage, you can be VERY happy with less than 100 Watts drive.
The YC-156/179 is far better than the 4-1000 both in performance and cleanliness of signal (on air comparisons). Of course you can't watch the anode blush but the big gratification comes from other things ;)
73, Tony W4ZT
Jan Erik Holm wrote:
Jim,
Grid drive I suppose? In GG I would guess with 200W drive
maybe 5-6 kW, or?
Im planing to replace my 2x4-1000As with a YC-156, I think
its a ideal tube. As soon as I can get hold of a good one
at a decent price, would be a quick swap. However it will
be GG.
The 4-1000A is a pain in the rear end and Im getting to old
to struggle with them.
73 Jim SM2EKM
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pentalab wrote:
### These YC-156's [and YC-172's] are a huge bang for the buck. 200 w drive = 10kw + out. No socket required. $400.00
### after messing about with multiple tube linears in the
Later.... Jim VE7RF
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