Very nice looking. I like it. You should make up a name for it and patend it!
Might be able to sell it and make millions.
Here is an image of the 300B amp (Silver Dragon) with PS. The amp and PS weigh 15kg each. I had the power tranni wound locally. Though huge it still gets hot. The amps draws 90mA per 300B at 435V.
There is a dual secondary Hammond filament tranni in the PS. This is rectified and regulated for the 300Bs. There is no electrolytic caps in the PS they are all Mundorf M-Caps polypropylene: 3 X 47uf and one 100uf. The TJ 300BSE tubes have an RRP of $1200. I have two pairs plus a pair of Shuguang 300B-Z 50 Year Treasures. The driver tube is a 6SN7 Shuguang 50 Year Treasure also. All tubes are ceramic base and gold pin.
There is a dual secondary Hammond filament tranni in the PS. This is rectified and regulated for the 300Bs. There is no electrolytic caps in the PS they are all Mundorf M-Caps polypropylene: 3 X 47uf and one 100uf. The TJ 300BSE tubes have an RRP of $1200. I have two pairs plus a pair of Shuguang 300B-Z 50 Year Treasures. The driver tube is a 6SN7 Shuguang 50 Year Treasure also. All tubes are ceramic base and gold pin.
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My latest digging-through-the-junkbox-project: 807 PP UL with 6SL7 LTP input stage and GZ34 rectifier. Edcor 15W 8K/8R output transformers, Hammond 300-series PT and a 10H 200mA choke from vt4c.com. The power transformer is a bit underrated and runs quite hot after an hour or so while only producing just over 300V B+. The amps sounds just fine, nothing special but fine.
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My new baby...
born after a single day of work, it's a quikie-like preamp!
Italian Flag, A baby preamp for babies. Very good taste!
Finally put the finishing touches on my own design instrument preamp. I'm no carpenter, so the case has some flaws, but she sounds great
Some nice fresh ideas are here. I like the idea of the partly hidden, angled tubes.
Two everyday systems actually....
Second pic is my SE flea-powered (6GW8 x 2 and EZ81) simple straight-forward 3 tube utilitarian amp which I reclaimed and renewed...about 3 watts p/c output. Easily drives my Wharfedale OB SFB/3s (also reclaimed and restored) to satisfactory levels.
First pic is my Motorolla PP 6V6 output based 3-channel amp also reclaimed and restored...about 9 watts p/c output...I've used this to drive less sensitive loudspeakers in my stable ie: Quad ESL57, Bozak B-4000s and Sony APM 22ES.
Both pretty modest by the high standards of some of the foregoing builds here but excellent learning and listening tools for me as I ponder my own from the ground-up build with reclaimed everything! OK, well maybe not reclaimed caps, resistors and wire but my electronics environmental sensibilities (and my thin wallet) compel me to re-utilize whatever I can salvage.
Second pic is my SE flea-powered (6GW8 x 2 and EZ81) simple straight-forward 3 tube utilitarian amp which I reclaimed and renewed...about 3 watts p/c output. Easily drives my Wharfedale OB SFB/3s (also reclaimed and restored) to satisfactory levels.
First pic is my Motorolla PP 6V6 output based 3-channel amp also reclaimed and restored...about 9 watts p/c output...I've used this to drive less sensitive loudspeakers in my stable ie: Quad ESL57, Bozak B-4000s and Sony APM 22ES.
Both pretty modest by the high standards of some of the foregoing builds here but excellent learning and listening tools for me as I ponder my own from the ground-up build with reclaimed everything! OK, well maybe not reclaimed caps, resistors and wire but my electronics environmental sensibilities (and my thin wallet) compel me to re-utilize whatever I can salvage.
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lately.. so sad, my hi-fi is in pieces, but I'm using tube type PC speakers I made with 70L7's. Transformer coupled in and out. They need a gain stage before the 70L7 as the volume is low. These are not hi-fi at all, but just a fun exercise.
Everything except the tubes, including the higher wattage resistors, are inside the plastic cabinets, but there are three 3/8" holes above those, and three similar holes at the rear bottom of the cabinets. The convection cooling is sufficient. The tube socket wiring comes out through the port in the cabinets.
If I have a complaint is is the inefficiency of those speaker drivers. This would be better at filling the area with sound with a simple un-pretentious 2-watt 'table radio' type 4" paper cone speaker in each box.
Everything except the tubes, including the higher wattage resistors, are inside the plastic cabinets, but there are three 3/8" holes above those, and three similar holes at the rear bottom of the cabinets. The convection cooling is sufficient. The tube socket wiring comes out through the port in the cabinets.
If I have a complaint is is the inefficiency of those speaker drivers. This would be better at filling the area with sound with a simple un-pretentious 2-watt 'table radio' type 4" paper cone speaker in each box.
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Mornings are filled with sound from a Philco 50-1720 console via 5W from a 50C6 and 8" full range speaker. A unique feature is one-knob bass+treble control. In the middle is flat, CW and CCW boost either bass or treble, Nicer than a simple tone control.
If nothing else everyone should feel great about their amps considering what's being listened to here these days. I have better amps but until the living room can be cleared of disorder, none of it can be used.
If nothing else everyone should feel great about their amps considering what's being listened to here these days. I have better amps but until the living room can be cleared of disorder, none of it can be used.
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Phono Preamp - Just Finished
This started life as simple phono stage to take the place of my K&K while it was undergoing a few upgrades and a chassis rework.
It turned into this... (Darn thing just sounded better and better with every upgrade)
S&B TX103's -> Hagerman Bugle -> Aikido Cathode Follower
Metal Work is from Mike at KM Audio Chassis, I did the Ebony and mirror polish on the case.
This started life as simple phono stage to take the place of my K&K while it was undergoing a few upgrades and a chassis rework.
It turned into this... (Darn thing just sounded better and better with every upgrade)
S&B TX103's -> Hagerman Bugle -> Aikido Cathode Follower
Metal Work is from Mike at KM Audio Chassis, I did the Ebony and mirror polish on the case.
An externally hosted image should be here but it was not working when we last tested it.
Finally put the finishing touches on my own design instrument preamp. I'm no carpenter, so the case has some flaws, but she sounds great
Nice ideas,
Just for interest..if you want to fill the couple of flaws in the wood try mixing some of the same wood sawdust into wood glue and use it as a filler..the colour should match..
Regards
M. Gregg
