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 Post subject: Hi From Dayton, Ohio
PostPosted: 13 Oct 2008, 20:27 
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Joined: 13 Oct 2008, 19:49
Posts: 41
Location: Dayton, Ohio
I've been interested in electronics since I was 8 years old getting very acquainted with the old Radio Shack P-Box kits. I started off learning more about tubes than transistors and by 1979 I started collecting old tube radios. I've been a ham since 1983.

I recently uploaded a picture of my 6T9 stereo amplifier which is still under construction. (Its the brass and wood box with 6 tubes and 3 transformers on it.)
I hope to have it operational soon (fingers crossed) It was inspired by Spare Time Gizmo's 6T9 amp, however I'm going the Push-Pull route with a 6EU7 preamp stage which was taken from an RCA tube manual. The rest of the circuit is taken from the Eico HF-81.

It is very interesting to see what other people have come up with in amplifier designs. Thanks!
-Steve

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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 13 Oct 2008, 21:15 
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Joined: 28 May 2008, 21:53
Posts: 4579
Location: Winnipeg, CANADA
Hi Steve, Welcome to the forum.

I've included a thumbnail of your 6T9 Tube Amp below for others to see.
Image
Full Size Image: Push-Pull 6T9 Tube Amplifier

Project Page: DIY Push-Pull 6T9 Tube Amplifier Project

Cheers,
Gio

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[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 13 Oct 2008, 21:29 
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Joined: 13 Oct 2008, 19:49
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Location: Dayton, Ohio
Oh, Thank you, Gio!
btw, I tried sending a ZIP file with other pictures of the amp. Did it make it through?
-Steve

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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 13 Oct 2008, 21:36 
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Joined: 06 Jun 2008, 18:23
Posts: 5143
Location: Australia
Bloody good looking amp. I even showed my wife!

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Projects:"retro2308" - chip based headphone amp | ”Calibre 834” - tube phono MM preamp | ”najah” - Raw 180W Tripath Class D power amp | "Icon" - Shuguang CV-181Z preamp


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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 14 Oct 2008, 10:45 
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Joined: 26 Aug 2008, 20:57
Posts: 415
Location: Atlanta
Very nice indeed!

What kind of power do you think you will get out of it? I would think 10w or so would be possible.

Also are you not using the internal triode or is it still acting as a driver?

Also also what are all the knobs for?


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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 14 Oct 2008, 11:03 
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Joined: 13 Oct 2008, 19:49
Posts: 41
Location: Dayton, Ohio
billnchristy wrote:
Very nice indeed!

What kind of power do you think you will get out of it? I would think 10w or so would be possible.

Also are you not using the internal triode or is it still acting as a driver?

Also also what are all the knobs for?

Thank you!
I'm hoping to get 8-10 watts per channel. I will be using the triode sections of the 6T9 for another stage of amplification and phase inverter.
The 6EU7s will be Bass & Treble tone control preamps.
Looking at the front, the controls are:
On/Off -- Input selector (3 inputs) -- Balance -- Bass -- Treble -- Volume.
Thanks for your interest! Its been a fun project so far.

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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 14 Oct 2008, 12:24 
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Location: Winnipeg, CANADA
z-strat wrote:
Oh, Thank you, Gio!
btw, I tried sending a ZIP file with other pictures of the amp. Did it make it through?

Hi Steve, yes, I did get your email and I sent you a reply late last night.

Cheers

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[ DIY Mains AC Power Cable Cord ] - [ Gobo LM1875 Amp Kit ] - [ Tang Band D4-1 Horn Speaker Kit ] - [ Monoblock Push-Pull KT88 Tube Amp Kit ]


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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 14 Oct 2008, 12:27 
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Joined: 26 Aug 2008, 20:57
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Location: Atlanta
Sweet. Cannot wait to see the insides...is it all point to point?


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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 15 Oct 2008, 06:36 
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Joined: 13 Oct 2008, 19:49
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Location: Dayton, Ohio
billnchristy wrote:
Sweet. Cannot wait to see the insides...is it all point to point?

Yes, no circuit boards here! Though, I might do something wild and install an S/PDIF interface which will require a PC board.

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 Post subject: Re: Hi From Dayton, Ohio
PostPosted: 22 Oct 2008, 08:08 
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Joined: 13 Oct 2008, 19:49
Posts: 41
Location: Dayton, Ohio
mwhouston wrote:
Bloody good looking amp. I even showed my wife!

Thank you, Mark! I hope she liked it too ;)

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