Why not just scratch build a clone? You will be pretty much do it anyway.

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Topic - Futterman H3 amp 'upgrades' - rogerh113 10:31:43 07/31/19 (72)

RE: Futterman H3 amp 'upgrades' - rhinohifi714 17:55:45 09/06/19 (1)

RE: Futterman H3 amp 'upgrades' - rogerh113 18:21:11 09/06/19 (0)

RE: Futterman H3 amp 'upgrades' - rhinohifi714 05:49:06 09/05/19 (3)

RE: Futterman H3 amp 'upgrades' - lucisfero1 14:05:47 01/03/20 (0)

RE: Futterman H3 amp 'upgrades' - rogerh113 07:17:54 09/05/19 (0)

RE: Futterman H3 amp 'upgrades' - rhinohifi714 05:50:34 09/05/19 (0)

RE: Futterman H3 amp 'upgrades' - rogerh113 06:18:44 09/01/19 (3)

RE: Futterman H3 amp 'upgrades' - peteoh9@gmail.com 09:45:06 07/16/20 (1)

RE: Futterman H3 amp 'upgrades' - rogerh113 06:40:41 07/18/20 (0)

RE: Futterman H3 amp 'upgrades' - airheadair 19:39:11 09/01/19 (0)

RE: Futterman H3 amp 'upgrades' - rogerh113 14:16:40 08/14/19 (0)

Just posted in case you missed it. (Link). - viridian 21:17:24 08/08/19 (26)

"At 4 ohms, output drops off to around 19Wpc, which is a bit ridiculous for a $288 amplifier." - Lew 17:47:08 08/13/19 (4)

RE: "At 4 ohms, output drops off to around 19Wpc, which is a bit ridiculous for a $288 amplifier." - lucisfero1 09:58:57 03/06/22 (0)

coupling cap value - Ralph 10:42:34 08/16/19 (2)

RE: coupling cap value - Lew 10:13:54 08/20/19 (1)

RE: coupling cap value - Ralph 12:17:06 08/26/19 (0)

RE: Just posted in case you missed it. (Link). - rogerh113 08:01:52 08/09/19 (20)

Their loss may be your gain. Or it may be... - viridian 14:37:22 08/10/19 (19)

RE: Their loss may be your gain. Or it may be... - rogerh113 14:56:28 08/10/19 (18)

RE: Their loss may be your gain. Or it may be... - Ralph 12:54:17 08/12/19 (14)

"Those who dot not study history will de doomed to repeat it." Santayana. nt - viridian 14:07:08 08/12/19 (13)

:) I found out about Futterman soon enough of course - Ralph 14:35:18 08/12/19 (12)

Somewhere I have an old hi-fi mag from the 50's and... - viridian 19:18:09 08/12/19 (11)

Beveridge? - Lew 18:44:29 08/13/19 (4)

No Lew, much earlier, the mono era. Nt - viridian 09:22:40 08/14/19 (3)

Thanks, V. - Lew 10:15:05 08/20/19 (0)

Definately the Phillips then. nt - Ralph 09:58:03 08/14/19 (1)

Thank you, Ralph. Ill be diggin' this weekend. nt - viridian 10:34:31 08/14/19 (0)

RE: Somewhere I have an old hi-fi mag from the 50's and... - Jim Dowdy 11:15:43 08/13/19 (3)

Thanks Jim, Ill have to do some digging this weekend. nt - viridian 16:09:50 08/13/19 (2)

Stephens link - Jim Dowdy 07:57:06 08/15/19 (1)

Wow, Jim thanks for sharing that.... - viridian 10:05:24 08/15/19 (0)

RE: Somewhere I have an old hi-fi mag from the 50's and... - airheadair 11:04:23 08/13/19 (0)

Wouldn't be a Phillips would it? nt - Ralph 10:30:13 08/13/19 (0)

Looks like you have a very sympathetic load... - viridian 16:41:45 08/10/19 (2)

RE: Looks like you have a very sympathetic load... - rogerh113 16:53:08 08/10/19 (1)

Beautiful work. No expert either, but you will find them here. nt - viridian 06:57:10 08/11/19 (0)

RE: Futterman H3 amp 'upgrades' - rogerh113 08:39:12 08/07/19 (15)

Why not just scratch build a clone? You will be pretty much do it anyway. - viridian 10:53:59 08/07/19 (12)

RE: Why not just scratch build a clone? You will be pretty much do it anyway. - rogerh113 12:03:55 08/07/19 (11)

DIY options - Ralph 10:58:06 08/08/19 (10)

RE: DIY options - rogerh113 18:50:07 08/08/19 (3)

RE: DIY options - Ralph 10:02:57 08/09/19 (2)

RE: DIY options - rogerh113 10:24:34 08/09/19 (1)

OTLs rule the roost when it comes to transparency - Ralph 10:28:50 08/09/19 (0)

RE: DIY options - rogerh113 11:24:59 08/08/19 (5)

RE: DIY options - Ralph 12:37:01 08/08/19 (2)

RE: DIY options - Lew 08:14:43 08/14/19 (0)

RE: DIY options - rogerh113 13:35:40 08/08/19 (0)

Front Panel Express is your friend! Nt - viridian 12:35:28 08/08/19 (1)

RE: Front Panel Express is your friend! Nt - rogerh113 14:25:43 08/08/19 (0)

RE: Futterman H3 amp 'upgrades' - airheadair 10:35:15 08/07/19 (1)

RE: Futterman H3 amp 'upgrades' - rogerh113 10:43:29 08/07/19 (0)

RE: Futterman H3 amp 'upgrades' - airheadair 13:48:53 08/04/19 (1)

RE: Futterman H3 amp 'upgrades' - rogerh113 14:31:31 08/04/19 (0)

Is it a "real" H3? - Lew 13:00:07 07/31/19 (6)

RE: Is it a "real" H3? - rogerh113 15:05:54 07/31/19 (5)

RE: Is it a "real" H3? - Lew 15:32:45 07/31/19 (4)

RE: Is it a "real" H3? - rogerh113 15:47:00 07/31/19 (3)

RE: Is it a "real" H3? - Lew 16:08:28 07/31/19 (2)

RE: Is it a "real" H3? - rogerh113 17:06:38 07/31/19 (1)

For 8 ohms and up,... - Lew 15:37:46 08/01/19 (0)

RE: Futterman H3 amp 'upgrades' - 6bq5 11:47:06 07/31/19 (8)

RE: Futterman H3 amp 'upgrades' - rogerh113 19:31:10 08/01/19 (7)

RE: Futterman H3 amp 'upgrades' - 6bq5 20:49:19 08/01/19 (6)

RE: Futterman H3 amp 'upgrades' - rogerh113 07:10:23 08/02/19 (5)

I've got a schematic somewhere,... - Lew 19:23:19 08/02/19 (4)

RE: I've got a schematic somewhere,... - rogerh113 10:44:53 08/03/19 (2)

RE: I've got a schematic somewhere,... - Lew 09:58:16 08/04/19 (1)

RE: I've got a schematic somewhere,... - rogerh113 10:02:26 08/04/19 (0)

RE: I've got a schematic somewhere,... - rogerh113 19:32:45 08/02/19 (0)

Follow Ups

Why not just scratch build a clone? You will be pretty much do it anyway. - viridian 10:53:59 08/07/19 (12)

RE: Why not just scratch build a clone? You will be pretty much do it anyway. - rogerh113 12:03:55 08/07/19 (11)

DIY options - Ralph 10:58:06 08/08/19 (10)

RE: DIY options - rogerh113 18:50:07 08/08/19 (3)

RE: DIY options - Ralph 10:02:57 08/09/19 (2)

RE: DIY options - rogerh113 10:24:34 08/09/19 (1)

OTLs rule the roost when it comes to transparency - Ralph 10:28:50 08/09/19 (0)

RE: DIY options - rogerh113 11:24:59 08/08/19 (5)

RE: DIY options - Ralph 12:37:01 08/08/19 (2)

RE: DIY options - Lew 08:14:43 08/14/19 (0)

RE: DIY options - rogerh113 13:35:40 08/08/19 (0)

Front Panel Express is your friend! Nt - viridian 12:35:28 08/08/19 (1)

RE: Front Panel Express is your friend! Nt - rogerh113 14:25:43 08/08/19 (0)

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