Marantz Model 9

mr2racer · 13th July 2012, 11:53 PM

Hello everyone,

I've been toying with the idea of building a pair of Model 9 monoblocks. And the output transformers seem to be a real stumbling block. From my research I've found for 8 ohms out they see a 3000 ohm PP. And if I'm not mistaken I think I remember seeing a 22% ultralinear screen tap. Obviously forget about the tertiary feedback windings. But has anyone seen such a transformer readily available?

I looked at Luhndal, Hammond, and Edcor. I was intending to use Plitrons but was warned against torroidal outputs. I have yet to talk to Heyboer, they seem to close right after lunch!

I think these may need to be custom? Any help would be appreciated.

kevinkr · 14th July 2012, 12:18 AM

Jack Elliano over at Electra-Print is another one to talk to, his OPTs are quite good. (I use a pair of customs he built for my GM 70 SE amps)

He is also reasonably priced.

mr2racer · 14th July 2012, 01:05 AM

Thanks Kevin. I completely forgot about Electra-print. I also forgot that I once asked Heyboer about Dynaco A451's which might work. 2200ohms but maybe a little massive. Heyboer quoted me $235 each which seems very reasonable. I'll contact Jack right away.

kevinkr · 14th July 2012, 02:07 PM

I suspect Jack can wind you something that is a bit closer in spirit than the dynaco A451..

tkk810 · 19th July 2012, 11:33 AM

[QUOTE=mr2racer;3091478]Hello everyone,

I've been toying with the idea of building a pair of Model 9 monoblocks. And the output transformers seem to be a real stumbling block. From my research I've found for 8 ohms out they see a 3000 ohm PP. And if I'm not mistaken I think I remember seeing a 22% ultralinear screen tap. Obviously forget about the tertiary feedback windings. But has anyone seen such a transformer readily available?

I looked at Luhndal, Hammond, and Edcor. I was intending to use Plitrons but was warned against torroidal outputs. I have yet to talk to Heyboer, they seem to close right after lunch!

I think these may need to be custom? Any help would be appreciated

I'm using Tamura F-2010 SERIES
(Bilirite Series)

mr2racer · 22nd July 2012, 05:28 PM

TKK810

Ever seen a price for the F-2011?

tkk810 · 23rd July 2012, 03:59 AM

i brought the pair at $2300 (Est USD$2000) about 10yrs ago

13th July 2012, 11:53 PM	#1
mr2racer diyAudio Member Join Date: Jul 2009	Marantz Model 9 Hello everyone, I've been toying with the idea of building a pair of Model 9 monoblocks. And the output transformers seem to be a real stumbling block. From my research I've found for 8 ohms out they see a 3000 ohm PP. And if I'm not mistaken I think I remember seeing a 22% ultralinear screen tap. Obviously forget about the tertiary feedback windings. But has anyone seen such a transformer readily available? I looked at Luhndal, Hammond, and Edcor. I was intending to use Plitrons but was warned against torroidal outputs. I have yet to talk to Heyboer, they seem to close right after lunch! I think these may need to be custom? Any help would be appreciated.

14th July 2012, 12:18 AM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Jack Elliano over at Electra-Print is another one to talk to, his OPTs are quite good. (I use a pair of customs he built for my GM 70 SE amps) He is also reasonably priced. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

14th July 2012, 02:07 PM	#4
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	I suspect Jack can wind you something that is a bit closer in spirit than the dynaco A451.. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

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14th July 2012, 01:05 AM	#3
mr2racer diyAudio Member Join Date: Jul 2009	Thanks Kevin. I completely forgot about Electra-print. I also forgot that I once asked Heyboer about Dynaco A451's which might work. 2200ohms but maybe a little massive. Heyboer quoted me $235 each which seems very reasonable. I'll contact Jack right away.

19th July 2012, 11:33 AM	#5
tkk810 diyAudio Member Join Date: Jul 2012	[QUOTE=mr2racer;3091478]Hello everyone, I've been toying with the idea of building a pair of Model 9 monoblocks. And the output transformers seem to be a real stumbling block. From my research I've found for 8 ohms out they see a 3000 ohm PP. And if I'm not mistaken I think I remember seeing a 22% ultralinear screen tap. Obviously forget about the tertiary feedback windings. But has anyone seen such a transformer readily available? I looked at Luhndal, Hammond, and Edcor. I was intending to use Plitrons but was warned against torroidal outputs. I have yet to talk to Heyboer, they seem to close right after lunch! I think these may need to be custom? Any help would be appreciated I'm using Tamura F-2010 SERIES (Bilirite Series)

22nd July 2012, 05:28 PM	#6
mr2racer diyAudio Member Join Date: Jul 2009	TKK810 Ever seen a price for the F-2011?

23rd July 2012, 03:59 AM	#7
tkk810 diyAudio Member Join Date: Jul 2012	i brought the pair at $2300 (Est USD$2000) about 10yrs ago

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