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PostPosted: July 12th, 2020, 4:33 pm 
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Haven't built his yet, but it's next up in the queue...
Image

Roscoe

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PostPosted: July 13th, 2020, 12:44 am 
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Haven't I seen this at your house before.......minus a few tricks?

Do you still have enough quiet 5842 tubes to do this?

Where are you getting your grid chokes from?

This one's going to be mono-blocks, right?


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PostPosted: July 13th, 2020, 7:57 am 
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Never saw a 100H choke.


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PostPosted: July 13th, 2020, 8:09 am 
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Magnequest has a 100H/20mA choke, which I bet is what Roscoe is using.

David


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PostPosted: July 13th, 2020, 8:14 am 
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A proper boat anchor builder would line up 10 Hammond 193M inductors. 10H 300 mh 63 ohms and a respectable 10.5 lb each.

ray


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PostPosted: July 13th, 2020, 9:57 am 
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Roscoe Primrose wrote:
Haven't built his yet, but it's next up in the queue...
Roscoe

Speaking of projects in the que -- did you ever build the tape-drive pre-amp you talked about? If you did -- how did it work out as compared to the stock electronics?

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PostPosted: July 13th, 2020, 11:04 am 
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FerdinandII wrote:
Haven't I seen this at your house before.......minus a few tricks?

Pretty much. The regulated driver supply is a new twist...

Quote:
Do you still have enough quiet 5842 tubes to do this?

Yes. I also have >150 8532s, which could also work great with a bit more inductance in the plate choke. Might need to get Dave Slagle to wind me a pair if I go that route.

Quote:
Where are you getting your grid chokes from?

They're plate chokes, Magenequest. Been in and out of the stereo 845 amp for quite some time...

Quote:
This one's going to be mono-blocks, right?

Absolutely. I'm getting too old to schlep around a stereo 845 amp any more ;)

Roscoe

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PostPosted: July 13th, 2020, 11:04 am 
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tomp wrote:
Never saw a 100H choke.


But you've heard them ;)

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PostPosted: July 13th, 2020, 11:05 am 
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ratbagp wrote:
A proper boat anchor builder would line up 10 Hammond 193M inductors. 10H 300 mh 63 ohms and a respectable 10.5 lb each.

ray

Nobody's ever accused me of being proper ;)

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PostPosted: July 13th, 2020, 11:06 am 
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SoundMods wrote:
Roscoe Primrose wrote:
Haven't built his yet, but it's next up in the queue...
Roscoe

Speaking of projects in the que -- did you ever build the tape-drive pre-amp you talked about? If you did -- how did it work out as compared to the stock electronics?


Not yet. I did pick up a pair of late 60s Ampex solid state electronics, but haven't done anything with those yet either...

Roscoe

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