So it begins....
And so it begins...
Moderators: pompeiisneaks, Colossal
And so it begins...
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Re: And so it begins...
How it is going....
Since I'm building on a non-standard chassis, (Weber 6M45 JTM45 style), it is a bit smaller and more crowded. It also comes with 6 holes for pots. So I drilled it for 8 pots, by using the pilot lamp hole and put a hole right between the second set of input jacks. So 8-across. The pilot light hole was a bit close to the standby switch, but a chicken head will fit.
Here is the chassis with 6 random stunt pots in it just to check the fitment.
Detail of the drilled out pilot light for the presence pot. I think it will be OK.
Here's the main, filter and rectifier boards in for a fit test and a first fire up of power supply. I've confirmed high-voltage B+, bias, and 5v regulated relay power derived from the rectifier filament winding of the power transformer. You may notice the 2-section F&T capacitor in the rectifier tube hole. It is a 50uf + 50uf at 500v. So I'll have 50uf at 700v for B+, 50uf for screen, 50uf for PI, and 2x 22uf for the preamp filters. I think plenty enough.
I found these 5v DPDT telecom relays super cheap at the surplus store. The coils are polarized but don't draw much power. They're pretty tiny and two of them fit on this Schmart-board easily, and it is about the size of a single relay board sold for ODS clone builds. Should let me squeeze it in.
Still working out where to place the front panel switches, and how I'm going to arrange the pedal circuit for the relays. I'm thinking about a multi-color LED for the pilot lamp, which will change colors with the activation of OD and PAB on the pedal.
Since I'm building on a non-standard chassis, (Weber 6M45 JTM45 style), it is a bit smaller and more crowded. It also comes with 6 holes for pots. So I drilled it for 8 pots, by using the pilot lamp hole and put a hole right between the second set of input jacks. So 8-across. The pilot light hole was a bit close to the standby switch, but a chicken head will fit.
Here is the chassis with 6 random stunt pots in it just to check the fitment.
Detail of the drilled out pilot light for the presence pot. I think it will be OK.
Here's the main, filter and rectifier boards in for a fit test and a first fire up of power supply. I've confirmed high-voltage B+, bias, and 5v regulated relay power derived from the rectifier filament winding of the power transformer. You may notice the 2-section F&T capacitor in the rectifier tube hole. It is a 50uf + 50uf at 500v. So I'll have 50uf at 700v for B+, 50uf for screen, 50uf for PI, and 2x 22uf for the preamp filters. I think plenty enough.
I found these 5v DPDT telecom relays super cheap at the surplus store. The coils are polarized but don't draw much power. They're pretty tiny and two of them fit on this Schmart-board easily, and it is about the size of a single relay board sold for ODS clone builds. Should let me squeeze it in.
Still working out where to place the front panel switches, and how I'm going to arrange the pedal circuit for the relays. I'm thinking about a multi-color LED for the pilot lamp, which will change colors with the activation of OD and PAB on the pedal.
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martin manning
- Posts: 14308
- Joined: Sun Jul 06, 2008 12:43 am
- Location: 39°06' N 84°30' W
Re: And so it begins...
Looking good, and I like that you are using the test-as-you-go method for the smoke testing.
Re: And so it begins...
Nice start. I like the multicolor LED idea.
Glenn
I solder better than I play.
I solder better than I play.