It was?
Says who!
Side Projects
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Dave the bass
- Amstrad Tower of Power
- Posts: 12276
- Joined: Tue May 22, 2007 4:36 pm
- Location: NW Kent, Darn Sarf innit.
#106 Re: Side Projects
"The fat bourgeois and his doppelganger"
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Paul Barker
- Social Sevices have been notified
- Posts: 8998
- Joined: Mon May 21, 2007 9:42 pm
#107 Re: Side Projects
I’ll give you an I couldn’t t do that award Mike.
"Two things are infinite, the universe and human stupidity, and I am not yet completely sure about the universe." – Albert Einstein
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Mike H
- Amstrad Tower of Power
- Posts: 20189
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#108 Re: Side Projects
Shucks guys. 
But ta muchly.
Appendix, trivia –
Transformers are –
#1. Vigortronix VTX-146-120-224, 120 VA, 2 x 24V @ 2.5A (main circuit supply)
Wired as: 0 – 48VAC
Fuse: inline, 2.5A
Rectifier: GBJ 2510 (bridge, SIL)
Reservoir cap Volts: 74V DC, no external load.
#2. Vigortronix VTX-146-015-224, 15 VA, 2 x 24V @ 320 mA (control circuits' supply)
Wired as: 24 – 0 – 24V (48V CT)
Fuses: inline, 400 mA x 2 (each end of + & – 24V)
Rectifiers: 4 x 1N4002 (as bridge with centre-tap)
Reservoir cap Volts: +34V DC & –36V DC.
Mains side fuse: inline, 2A, + inrush limiter.
Transformers include thermal fuses.
But ta muchly.
Appendix, trivia –
Transformers are –
#1. Vigortronix VTX-146-120-224, 120 VA, 2 x 24V @ 2.5A (main circuit supply)
Wired as: 0 – 48VAC
Fuse: inline, 2.5A
Rectifier: GBJ 2510 (bridge, SIL)
Reservoir cap Volts: 74V DC, no external load.
#2. Vigortronix VTX-146-015-224, 15 VA, 2 x 24V @ 320 mA (control circuits' supply)
Wired as: 24 – 0 – 24V (48V CT)
Fuses: inline, 400 mA x 2 (each end of + & – 24V)
Rectifiers: 4 x 1N4002 (as bridge with centre-tap)
Reservoir cap Volts: +34V DC & –36V DC.
Mains side fuse: inline, 2A, + inrush limiter.
Transformers include thermal fuses.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
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Mike H
- Amstrad Tower of Power
- Posts: 20189
- Joined: Sat Oct 04, 2008 5:38 pm
- Location: The Fens
- Contact:
#109 Re: Side Projects
Had to recalibrate the Voltmeter. For the 10V scale this is done by adding a low value resistor in series. I don't know where I got the idea from that it should be 20 Ω. More like 100 Ω. Actually, it IS 100 Ω.
That being done, the 50V scale was reset (twiddle preset), and readings are a lot more accurate now.
More like 100 Ω. Actually, it IS 100 Ω.That being done, the 50V scale was reset (twiddle preset), and readings are a lot more accurate now.
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."