Driving Raven R2 with tubes

exurbia · 12th April 2009, 12:56 AM

This may seem to be an odd question, would Heathkit WM4's be ok to use for Raven R2 ribbons ? I was using a Perreaux s/s amp but the switch off surges destroy the ribbons.
I run them actively from my DEQX, so no X/O to kill the spikes. The rest of my amps are Yammie 2002 (mids) and UCD 400's for the Bottom end.
Any thoughts or opinions would be appreciated as i only have one set of spare ribbons left.
Tia, Peter.
p.s i've already tried a series cap, it still lets through a large craaack when the aircon cycles.

wg_ski · 12th April 2009, 02:30 AM

If you're getting a "craaack" when the A/C switches you'll probably still get that no matter what amp you're using - that's probably getting in ahead of the amps. With a tube amp, at least the turn on/off thumps will be history.

For what it's worth, I've found the R2 to be almost too fragile. I went back to the R1 because it can actually put out more acoustic power above 3k without damage than the R2.

exurbia · 12th April 2009, 02:37 AM

thanks for that reply, maybe i'm overdriving the R2's as well as getting mains born nasties.
we have a load of deep cycle 6 volt batteries at work, if i can scab them i'll try running my WM4's HT and heaters from them. we also have some solar chargers for these and living where i do i'll never be unable to charge the batteries (they have a mains input for night or overcast) 355 sunshine days a year.
cheers,
Peter.

wg_ski · 12th April 2009, 03:36 AM

Does that amp have a choke input power supply? That will help with stuff on the mains (if it's coming in the power amp).

12th April 2009, 12:56 AM	#1
exurbia diyAudio Member Join Date: Jul 2002 Location: Perth	driving Raven R2 with tubes This may seem to be an odd question, would Heathkit WM4's be ok to use for Raven R2 ribbons ? I was using a Perreaux s/s amp but the switch off surges destroy the ribbons. I run them actively from my DEQX, so no X/O to kill the spikes. The rest of my amps are Yammie 2002 (mids) and UCD 400's for the Bottom end. Any thoughts or opinions would be appreciated as i only have one set of spare ribbons left. Tia, Peter. p.s i've already tried a series cap, it still lets through a large craaack when the aircon cycles.

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12th April 2009, 02:30 AM	#2
wg_ski diyAudio Member Join Date: Oct 2007	If you're getting a "craaack" when the A/C switches you'll probably still get that no matter what amp you're using - that's probably getting in ahead of the amps. With a tube amp, at least the turn on/off thumps will be history. For what it's worth, I've found the R2 to be almost too fragile. I went back to the R1 because it can actually put out more acoustic power above 3k without damage than the R2.

12th April 2009, 02:37 AM	#3
exurbia diyAudio Member Join Date: Jul 2002 Location: Perth	thanks for that reply, maybe i'm overdriving the R2's as well as getting mains born nasties. we have a load of deep cycle 6 volt batteries at work, if i can scab them i'll try running my WM4's HT and heaters from them. we also have some solar chargers for these and living where i do i'll never be unable to charge the batteries (they have a mains input for night or overcast) 355 sunshine days a year. cheers, Peter.

12th April 2009, 03:36 AM	#4
wg_ski diyAudio Member Join Date: Oct 2007	Does that amp have a choke input power supply? That will help with stuff on the mains (if it's coming in the power amp).

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