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06-07-2009, 03:01 AM
| #1 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| 5F6A with Trem and verb experiment
The schemes and ideas came from this thread (which has gotten too long to add new stuff to easily). Tweed Bassman / Deluxe w/ reverb. any opinion? I eventually settled on version 12 something-or-other, and started work on the chassis a few weeks ago and yesterday did some more (fitted up the iron and made the main filter board & dog house) and today the weather looks suitable to do some more (- whatever the weather  ).Chassis is 65 cm long (and will have 11 knobs and 6 pre-amp tubes). Its another combo, this time with 2 x 25W greenbacks - more like a JTM45/bluesbreaker than a tweed bassman - but they're all just tweed bassmen right?. (zhyla has inspired me to try a different finish on the chassis, so I got some lazertran and enamel paint, and I'm experimenting with different finishes on some off-cuts of ally - more on that as time passes)
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06-07-2009, 01:04 PM
| #2 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| Cab started
75cm wide 50cm high 23 cm deep - but the same 'ole white pine. The new 'innervation' for me is a 3/4" slant on the front (I try to make at least one little improvement with each amp  ). This is going to seriously cramp up my amp cupboard (my stuff is already overflowing into the hallway)
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06-07-2009, 03:16 PM
| #3 |
| Senior Member  Join Date: Mar 2008 Location: Germany
Posts: 728
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Man, that all looks great. Can hardly wait to see more. Should I wish for bad weather? |
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06-09-2009, 08:03 AM
| #4 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| routing finished on cab
ready to make the baffle (front fitting baffle)
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06-09-2009, 08:40 AM
| #5 |
| Senior Member Join Date: Apr 2007 Location: sydney australia
Posts: 776
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looking good. curious how it will sound with the greenbacks in an openback cab.
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06-09-2009, 10:18 AM
| #6 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
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I'm using a fairly beefy Pt and OT and a mixture of mustard caps and orange drops for the coupling caps, so I'm guessing it will sound something like a JTM45/bluesbreaker-cum-tweed bassman (with a deepish 'verb and bias-vary trem) if that ain't too much of a bastard - but my guess could be wrong I put a 20W greenback in an open back combo (5G9) I built last year and it smokes
__________________ Building a better world (one tube amp at a time) Last edited by tubeswell; 06-09-2009 at 08:10 PM. |
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06-17-2009, 09:39 PM
| #7 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
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Progress update Got the main board made and fitted (including the mounting board for the bias trimpot. Just the socket mounting to come and a few more holes, then I'll take it all apart and finish the chassis (somehow - haven't decided whether to go for a polished natural metal look this time, or a painted decal 'd look) Also wired in the filter board, and cut some carry-handles in the cab sides for lugability
__________________ Building a better world (one tube amp at a time) Last edited by tubeswell; 06-17-2009 at 09:47 PM. |
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06-21-2009, 12:56 AM
| #8 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| Baffle
Got the baffle (3/4" ply) done yesterday (bar covering). I didn't know how far apart to put the greenbacks, so the holes ended up 3.25" apart (so the speaker centres are 14.25" apart) - WTF.
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06-21-2009, 08:58 AM
| #9 |
| Old Timer Join Date: May 2007 Location: pacific north west
Posts: 1,478
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Woah, thats a big cabinet. Even for a 2x12. Should sound big too though. Serious eye candy. How do you plan to finish? Natural, tweed or tolex? And how are you coupling the verb into the circuit??? Chuck |
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06-21-2009, 11:41 AM
| #10 | |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| Quote:
I've got heaps of black & white gingham tweed from previous builds As far as the verb goes, see the version 12 schematic in that thread at the beginning
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07-04-2009, 11:28 AM
| #11 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| moving along
Got the cab covered and the G12s on board Did most of the main board this avo
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07-04-2009, 08:13 PM
| #12 |
| Senior Member Join Date: Mar 2008 Location: Germany
Posts: 728
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Looks veeeery tidy. Great work. Maybe in a couple decades when people talk about these amps of yours they'll refer to the gingham tweed era. |
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07-05-2009, 09:31 AM
| #13 |
| Member  Join Date: Sep 2008 Location: isernia- italy
Posts: 52
| well done!
very nice build, I like it. It seems my amp brother :-) What kind of material did you use for the eyelet board? Thank you, Vincenzo
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07-05-2009, 12:37 PM
| #14 | |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
| Quote:
I use 3mm electrical switchboard from an electrician supply wholesaler, and 4mm brass eyelets. The stuff is rated for mega-volts so its ideal.
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07-05-2009, 01:34 PM
| #15 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
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Squeakin' on Sockets in and heaters 90% wired in. The durafilm will come off after I've finished the engraving. 5A enough for the heaters ya'll reckon? (including the lamp) Decided to do away with a standby switch this time - using the extra real estate for an HT fuse (beside the Mains fuse)
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07-08-2009, 12:08 PM
| #16 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
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Quite a bit more work on the chassis today (and yesterday) Engraving done, and wired in the input and output sockets, main sw, fuses, pilot lamp, PT, OT, choke filter board, and wired up the back of the main board and all pots trimmed and fitted. Weighs a ton.
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07-13-2009, 11:25 PM
| #17 |
| Supporting Member Join Date: Feb 2007 Location: Wellington NZ
Posts: 2,645
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1st attempt at chassis wiring finished. I put shielded cable in all the areas I think are sensitive signal paths, so we'll see. I have also omitted the rotary switch/impedance selector I had planned at this stage because it was too fiddly. I need to get a simpler one.
__________________ Building a better world (one tube amp at a time) Last edited by tubeswell; 07-14-2009 at 02:11 AM. |
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08-05-2009, 11:53 PM
| #18 |
| Junior Member |
Great project!
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