Haven't built his yet, but it's next up in the queue...
Roscoe
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| New Project - Direct coupled 845 SE amp. http://www.dcaudiodiy.com/phpBB3/viewtopic.php?f=4&t=1679 |
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| Author: | Roscoe Primrose [ July 12th, 2020, 4:33 pm ] |
| Post subject: | New Project - Direct coupled 845 SE amp. |
Haven't built his yet, but it's next up in the queue... Roscoe |
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| Author: | FerdinandII [ July 13th, 2020, 12:44 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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| Author: | tomp [ July 13th, 2020, 7:57 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
Never saw a 100H choke. |
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| Author: | David McGown [ July 13th, 2020, 8:09 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
Magnequest has a 100H/20mA choke, which I bet is what Roscoe is using. David |
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| Author: | ratbagp [ July 13th, 2020, 8:14 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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| Author: | SoundMods [ July 13th, 2020, 9:57 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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| Author: | Roscoe Primrose [ July 13th, 2020, 11:04 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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| Author: | Roscoe Primrose [ July 13th, 2020, 11:04 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
tomp wrote: Never saw a 100H choke. But you've heard them
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| Author: | Roscoe Primrose [ July 13th, 2020, 11:05 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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| Author: | Roscoe Primrose [ July 13th, 2020, 11:06 am ] |
| Post subject: | Re: New Project - Direct coupled 845 SE amp. |
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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