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Old 15th June 2011, 04:33 AM   #3491
SVStube is offline SVStube  Ukraine
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Quote:
Originally Posted by tomchr View Post
Very nice work!! What's the chassis material?

~Tom
Hi, Tom.
The chassis is welded from sheet steel 2 mm thick. Caps on the output transformers are also steel, aluminum on the power transformer. All this is painted with powder paint.
Weight transformers more than 15 kg and chassis material selected for mechanical strength.
Serhiy
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Old 15th June 2011, 10:16 PM   #3492
mhouston is offline mhouston  Australia
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[QUOTE=polyphaze;2605891]
Quote:
Originally Posted by Steve Cresswell View Post
Hi

After a few weeks of work we now have a pair of monoblock PL509 sweep tube single ended pentode amps.


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Is the smaller tube with the green writing from the CONN organ company. I have a bunch of them (12AU7) and I'm in Australia??

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A very attractive piece IMO. And what a lovely sheen on the metal.
Is it aluminum, steel, or something else?
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Old 16th June 2011, 08:31 AM   #3493
Steve Cresswell is offline Steve Cresswell  United Kingdom
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Location: Away with the faeries
The small tube is a NOS Sylvania 7 pin 6AU6 pentode.

The chassis is a 2mm thick aluminium guitar amp chassis off eBay

Guitar Amp Chassis blank for JTM45 Marshall and others on eBay (end time 18-Jun-11 10:23:18 BST)

The chassis itself was conditioned with a bit of oil on a rag to get the sheen

Steve
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Old 16th June 2011, 08:18 PM   #3494
M Gregg is offline M Gregg  England
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Quote:
Originally Posted by Steve Cresswell View Post
The small tube is a NOS Sylvania 7 pin 6AU6 pentode.

The chassis is a 2mm thick aluminium guitar amp chassis off eBay

Guitar Amp Chassis blank for JTM45 Marshall and others on eBay (end time 18-Jun-11 10:23:18 BST)

The chassis itself was conditioned with a bit of oil on a rag to get the sheen

Steve
Very nice,
Where is the grommet eh...fancy not putting a grommet in the front connection..Picky...lol

They are very nice but where is the grommet? LOL

Regards
M. Gregg
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Old 17th June 2011, 07:40 AM   #3495
vermeero is offline vermeero  Netherlands
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I think those PL509 monos by Steve Cresswell are wired very tidy and neat on the inside! Looks like an example.
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Old 17th June 2011, 11:26 AM   #3496
radiocrazier is offline radiocrazier  China
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Default Anyone like from a chinese student's Valve Amplifier

Hello ya all,I'm just loggin in serval minutes, i see lots of people like making the tube amp,and I can't bear to show my own amplifier and earphone amplifier,but sorry for my poor english,Thanks! Can't I insert the picture? it's very strange~
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Old 17th June 2011, 03:07 PM   #3497
mhouston is offline mhouston  Australia
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Here is the Super Simple Single Satge Tube preamp. The PS and amp exist on one small peice of brd with no cct. All component-2-component connections, silver soldered, plus Alps pot on the output, 4oz solid brass knob and brass arty bits. A 24V wall wart connects to the grid and this 4Ss preamp sounds better than it looks. YES REALLY!
Attached Images
File Type: jpg SSTAmpInside.jpg (145.6 KB, 1360 views)
File Type: jpg SSTAmpFinished.jpg (81.6 KB, 1340 views)
File Type: jpg SSTAmpTop.jpg (88.5 KB, 1252 views)

Last edited by mhouston; 17th June 2011 at 03:09 PM.
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Old 17th June 2011, 08:23 PM   #3498
vermeero is offline vermeero  Netherlands
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Default Dynakit ST35

My 2nd build, a kit! I so do like this amplifier... it's compact and performs really well.
Now I'm planning and ordering parts for a 'completely done by myself build', a SE EL84 amplifier.
Attached Images
File Type: jpg IMG_8908b.jpg (391.3 KB, 401 views)
File Type: jpg IMG_8920.jpg (489.5 KB, 485 views)
File Type: jpg voorkant.jpg (252.3 KB, 496 views)
File Type: jpg testbeneden2b.jpg (415.5 KB, 493 views)
File Type: jpg top_amp.jpg (960.6 KB, 505 views)
File Type: jpg IMG_8906.jpg (120.0 KB, 423 views)

Last edited by vermeero; 17th June 2011 at 08:38 PM.
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Old 24th June 2011, 07:59 PM   #3499
fullrangeSR is offline fullrangeSR  Canada
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Amp #1 SEP EL84 - Transcendar OPTs, Hammond PT and the choke.
Amp #2 SEP EL84 - vintage Philips console PT and OPTs, Hammond choke.
Amp #3 SEP EL84 - vintage RCA Calypso console PT and OPTs, hand-wound choke.
Amp #4 SEP EL84 vintage Philips EL3536 RtR PT and OPTs, Hammond choke.
Amp #5 SEP EL84 vintage Philips EL3536 RtR PT and OPTs, two Hammond chokes.

Why so many amps of the same kind? Well, 1) building tube amps is fun a sort of creativity 2) it would be a shame to throw away those still-excellent transformers of yore 3) to gather money for 2A3 and (maybe) 300B and ECL86 projects (and EL84 again; they, after all, sound real nice)
Attached Images
File Type: jpg AMP1.jpg (496.7 KB, 479 views)
File Type: jpg AMP2.jpg (323.9 KB, 450 views)
File Type: jpg AMP3.jpg (214.0 KB, 470 views)
File Type: jpg AMP5.jpg (400.2 KB, 442 views)
File Type: jpg AMP4.JPG (369.2 KB, 357 views)

Last edited by fullrangeSR; 24th June 2011 at 08:04 PM.
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Old 24th June 2011, 09:06 PM   #3500
vermeero is offline vermeero  Netherlands
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Default amps made by fullrangeSR

Those are some good looking amplifiers! Well finished too.
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