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First time F5 build
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Old 14th March 2019, 08:10 PM   #71
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
Location: Yellowknife
Quote:
Originally Posted by rayma View Post
You must be 100% sure before powering it up. This also includes the capacitor polarities.
If I was a 100% sure I don't suppose I'd be here asking and the thing would be plugged into the wall already . I'm 58. I can't tell you how many times I've been sure about something only to have my ego spanked.

This light bulb tester - does it need a switch or just plug it into the wall and plug the PSU into it? The bulb will come on of course.
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Old 14th March 2019, 08:19 PM   #72
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
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additionally, a link ( Powering Your Radio Safely with a Dim-bulb Tester ) provided in a related post indicates I need to have the correct wattage of light. What might that be for this PSU built around the F5?

Thx
D
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Old 14th March 2019, 08:22 PM   #73
rayma is offline rayma  United States
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Quote:
Originally Posted by Trismos View Post
If I was a 100% sure I don't suppose I'd be here asking
This light bulb tester - does it need a switch
You should post photos, the schematic, and the transformer mfr wiring diagram here,
so others can do the 100% certain part.

I'd use a wall switch or a switched outlet strip to turn on the power.
You don't want to be near the power supply or amp at switch on.

If there is NOT a big problem, the bulb will NOT light up.
If there IS a big problem, the bulb WILL light up.

Last edited by rayma; 14th March 2019 at 08:27 PM.
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Old 14th March 2019, 08:25 PM   #74
rayma is offline rayma  United States
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Quote:
Originally Posted by Trismos View Post
I need to have the correct wattage of light. What might that be for this PSU built around the F5?
A 100W (incandescent only, no LED or fluorescent types) bulb should do ok.
Will you power up the power supply without any load, or connected to the amplifier?
Post the wiring diagram of your transformer first.

Last edited by rayma; 14th March 2019 at 08:29 PM.
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Old 14th March 2019, 08:25 PM   #75
twitchie is offline twitchie  Canada
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First time F5 build
With respect to connecting primaries, if you don't have them wired such that both windings go through a thermistor, you won't blow anything up other than maybe the IEC fuse but you will not be gaining the benefit of inrush current limiting that the CL-60 thermistors are meant to provide.

I looked at my store PSU board and your caps look oriented correctly.

Try a 100W bulb for the tester if you have. If there is a short it will light up bright and stay lit strongly. If it's good, it is supposed to light only briefly on turn-on and then dim to indicate not-strong current draw.
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Old 14th March 2019, 08:36 PM   #76
Trismos is offline Trismos  Canada
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Quote:
Originally Posted by rayma View Post
You should post photos, the schematic, and the transformer mfr wiring diagram here,
so others can do the 100% certain part.
Hi Rayma

Pics posted above. I don't read schematics very well but tend to follow instructions well (I'm married after all), and I basically followed the excellent builds posted by 6L6 on both the PSU and the F5.
I'm using the Antek 4218 400VA 18V.

AS_4218__400VA 18V.jpg
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Old 14th March 2019, 08:38 PM   #77
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
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Quote:
Originally Posted by twitchie View Post
With respect to connecting primaries, if you don't have them wired such that both windings go through a thermistor, you won't blow anything up other than maybe the IEC fuse but you will not be gaining the benefit of inrush current limiting that the CL-60 thermistors are meant to provide.

I looked at my store PSU board and your caps look oriented correctly.

Try a 100W bulb for the tester if you have. If there is a short it will light up bright and stay lit strongly. If it's good, it is supposed to light only briefly on turn-on and then dim to indicate not-strong current draw.
Thx Twitchie, makes me feel a tad more at ease. I'll build this light bulb tester before I proceed any further.
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Old 14th March 2019, 09:01 PM   #78
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
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Quote:
Originally Posted by rayma View Post
A 100W (incandescent only, no LED or fluorescent types) bulb should do ok.
Will you power up the power supply without any load, or connected to the amplifier?
Post the wiring diagram of your transformer first.
I wasn't thinking it was a good idea to wire up the amps without testing the PSU first....
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Old 14th March 2019, 09:02 PM   #79
rayma is offline rayma  United States
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Quote:
Originally Posted by Trismos View Post
I'm using the Antek 4218 400VA 18V.
You do have 120VAC line voltage there, correct?
It is unfortunate that the Antek wiring diagram is very poor
and ambiguous, at best. Too bad, no wonder you were uncertain.

The primary wiring:
Connect both REDS to one AC source terminal.
Connect both BLACKS to the other AC source terminal.
This parallels (in phase) the primary windings.

Secondary wiring:
Use an ohm meter to sort the 4 secondary leads into two pairs.
A pair should show low resistance between green and blue.
Tape the two wires of each pair together near the ends
when you are certain so they don't get mixed up.

Connect one pair (green/blue) to one pair of AC input terminals.
Connect the other pair (green/blue) to the other pair of ac input terminals.

Last edited by rayma; 14th March 2019 at 09:14 PM.
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Old 14th March 2019, 10:14 PM   #80
Trismos is offline Trismos  Canada
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Join Date: Feb 2012
Location: Yellowknife
Quote:
Originally Posted by rayma View Post
You do have 120VAC line voltage there, correct?
It is unfortunate that the Antek wiring diagram is very poor
and ambiguous, at best. Too bad, no wonder you were uncertain.

The primary wiring:
Connect both REDS to one AC source terminal.
Connect both BLACKS to the other AC source terminal.
This parallels (in phase) the primary windings.

Secondary wiring:
Use an ohm meter to sort the 4 secondary leads into two pairs.
A pair should show low resistance between green and blue.
Tape the two wires of each pair together near the ends
when you are certain so they don't get mixed up.

Connect one pair (green/blue) to one pair of AC input terminals.
Connect the other pair (green/blue) to the other pair of ac input terminals.
Thanks Rayma - I do believe I have it right then. And yes, 110V typical circuit in the house.

I just ran out to the hardware store to pick up parts for a bulb tester - had to run over to Walmart and dig thru the back to find a 100 watt incandescent type. I have 3 spares if anyone else runs into this problem!
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