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45 SE [message #11092]

Thu, 02 June 2005 12:29

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

Any one ever build a 45 SE amp? Looking for suggestions and schematics......Colin

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Re: 45 SE [message #11093 is a reply to message #11092]

Thu, 02 June 2005 15:56

Manualblock
Messages: 4973
Registered: May 2009

Illuminati (13th Degree)

Want a copy of The Bugle? It's Wavelength Audio's 45 published for private use in SP issue 13. There is a very thorough thread concerning 45's on ART or maybe in Pi Speakers. Many of us have heard the 45 in various configurations and it is discussed on that thread. In my opinion; not enough power for the Altecs.

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Re: 45 SE [message #11094 is a reply to message #11093]

Thu, 02 June 2005 16:43

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

Yes, I'd like to take a look at it. IS this of their Sig 45? I've always liked the looks of Wavelength Audio, but their prices are well above what I can afford to spend. By the way, these guys are just right down the road from me. Maybe I should go over and do some dumpster diving.......Colin

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Re: 45 SE [message #11095 is a reply to message #11094]

Thu, 02 June 2005 16:51

Manualblock
Messages: 4973
Registered: May 2009

Illuminati (13th Degree)

Well; there you go! Just get those black ski mask and gloves and slip on in. Is Gordon Rankin still with them?
I will send the Article ASAP.

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Re: 45 SE [message #11096 is a reply to message #11092]

Thu, 02 June 2005 22:34

Mark Williams
Messages: 48
Registered: May 2009

Baron

Hi,

Here's one from Electra-Print I found last night.

http://www.electra-print.com/2A3DRD.html

Mark

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Re: 45 SE [message #11097 is a reply to message #11096]

Thu, 02 June 2005 23:02

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

Thanks for the link. I forgot all about EP. Looking through their other schematics, I found a 45

.....Colin

http://www.electra-print.com/images/45DRD.jpg

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Re: 45 SE and also 2A3 [message #11098 is a reply to message #11097]

Fri, 03 June 2005 06:39

Mark Williams
Messages: 48
Registered: May 2009

Baron

Hi Colin,

I thought it was odd because earlier on I had seen a post where you pointed someone to the Electra-Print site.

There's no pwr. supply for that 45 DRD posted. I'm interested in a 2A3 DRD myself, with SS rectifier, just like the Welbourne Labs.

Do you know how to alter the 300B one shown on the Electra-Print site? Is that possible, or just a good idea to start from scratch? It seems the B+ of the 300B is much higher and also as I recall the heater voltage supplied too is higher. So, perhaps a different transformer is in order?

I don't feel I know enough to design my own yet. I'm not very expert at electronics, just a rookie.

Mark

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Re: 45 SE and also 2A3 [message #11099 is a reply to message #11098]

Fri, 03 June 2005 07:42

colinhester
Messages: 1349
Registered: May 2009
Location: NE Arkansas

Illuminati (3rd Degree)

That's what I get for trying to google and not think.

Is the power supply not drawn at the bottom of the schematic? It's a B+ of 500V using a PWR45 Trans.

What I know about power supplies could be written on the back of a postage stamp. I'm pretty much the newest newbie.

I think Forty2wo (John S.) over in the Group Build Forum is going to build the DRD300b. John is a real good guys and helped us with the preamp build; he knows his stuff and might be worth pinging.....Colin

http://audioroundtable.com/GroupBuild/messages/1116.html

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Re: 45 SE and also 2A3 [message #11103 is a reply to message #11099]

Fri, 03 June 2005 15:25

Mark Williams
Messages: 48
Registered: May 2009

Baron

Ah yes, Colin...

We were looking at different pages, one of them with "drive" in the title does have the 45 amp power supply shown.

This should work for the 2A3 as long as the heater voltage requirements are the same with the 2A3 and the 45. Will have to check on that.

Good suggestion about the Group Build Forum. I just discovered it last night and did notice some interest in the 300B. Thanks for pointing me over there.

These look pretty simple, so even "dummies" like us should be able to construct, right? Maybe with a little help from Forty2wo?

Mark