Emperors new clothes and the sound of tubes

[Robert Morin]

Originally posted by reinhard
hello Robert,

I´m interrested in the schematic file also.
Can you mail it to email-removed *

Thanks a lot.

Reinhard

* i emailed your address to Robert. We are discouraging the direct posting of emails to minimize spam. dave

Done

Regards
Robert Morin

[Robert Morin]

Originally posted by Brett


I'd be interested in seeing a schematic if you can post it, or alternatively via email.

Cheers

You have mail

Regards
Robert Morin

[planet10]

And here is Robert's amp for all:

dave

[fdegrove]

Hi,

Robert,

I assume you lifted the heaters of the top half 6080 with respect to groung?

This sure looks like an interesting amp and reminds me of the Philips OTL.

Cheers,

[Robert Morin]

Originally posted by fdegrove
Hi,

Robert,

I assume you lifted the heaters of the top half 6080 with respect to groung?

This sure looks like an interesting amp and reminds me of the Philips OTL.

Cheers,

I have all of the heaters running on one filament transformer. The 6as7 can take 300v plus or minus with respect to cathode. So a positive offset of 100v on the heater will keep the top 1/2 of the 6as7 happy along with the 6111.

Also an afterthought.
Either use a softstart B+ or don't power up the amp in a stand by mode ( use the filaments as a soft start) because the 6as7 will have a short life if B+ hits the tubes after filament warm-up.

Regards
Robert Morin

[fdegrove]

Hi,

Also an afterthought.

Either use a softstart B+ or don't power up the amp in a stand by mode ( use the filaments as a soft start) because the 6as7 will have a short life if B+ hits the tubes after filament warm-up.

Actually that is valid for any tube,softstart is O.K but putting the out of standby does more damage than good.
Few people are aware of this.

I run monoblocks with 10 // 6AS7G that switched on directly.
It never caused any trouble since 15 years of use.

Cheers,