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There is a simple solution to the problem [message #9474 is a reply to message #9471]

Fri, 30 December 2005 06:36

Old Brown Eyes
Messages: 25
Registered: May 2009

Chancellor

If something was added, a switch or a relay for example, to short the output to ground at start up one would be protected. A long time ago I tried out the original foreplay with a solid state amp. Being ingnorant I was doing quick AB swaps between preamps. The solid state amp didn't mind but I did blow speaker fuses and didn't know why at the time:)

Given that the new foreplay has dual secondaries I don't understand why they decided to parallel them, use a voltage doubler to create a raw 300VDC B+, and then CR filter it down to a OD3 150vdc regulated supply. Seems to me having more voltage to work with would be a plus....especially when direct coupling....heck maybe even a bi-polar supply for a big tail resistor in the CF.

Russ

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[Message index]

		is ok to put a tube PRE in front of SS amp? By: paba on Tue, 27 December 2005 20:53
		Yes, No, Maybe.... By: Old Brown Eyes on Wed, 28 December 2005 05:32
		Re: Yes, No, Maybe.... By: paba on Wed, 28 December 2005 07:00
		Re: Yes, No, Maybe.... By: 2wo on Wed, 28 December 2005 16:14
		Re: Yes, No, Maybe.... By: PakProtector on Thu, 29 December 2005 20:42
		There is a simple solution to the problem By: Old Brown Eyes on Fri, 30 December 2005 06:36
		Re: There is a simple solution to the problem By: PakProtector on Fri, 30 December 2005 07:07
		It may also affect power-down too By: GarMan on Thu, 05 January 2006 11:41
		Power up, down sequence By: Shane on Sat, 07 January 2006 22:10

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