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Old 20th September 2019, 02:36 PM   #11
Steve Morley is offline Steve Morley  Canada
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Do you mean a 2 amp fuse?

Steve
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Old 20th September 2019, 02:38 PM   #12
qguy2000 is offline qguy2000
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Quote:
Originally Posted by Steve Morley View Post
Do you mean a 2 amp fuse?

Steve

Yes, 2 amps

I initially did my testing/measurements without the fuse.
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Old 20th September 2019, 02:39 PM   #13
qguy2000 is offline qguy2000
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I mean 2 amp fuse...

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EDIT: I inserted a 2 amp resistor on the secondary and it blows
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Old 20th September 2019, 02:48 PM   #14
Steve Morley is offline Steve Morley  Canada
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It's possible to blow a 2 amp fuse in the secondary. Fuse the primary side of the power trans with about a 1/2 amp slow blow fuse.

Your voltage readings with the 20 ohm resistor are about correct. Yes this resistor will get warm. You will need a 5 watt resistor here. I used two 51 ohm, 3 watt res in parallel here, equivalent to 25.5 ohm. 6 watt res. Theses still get warm. So if you want it to run cool a 10 watt res ( or 2 5 watt in parallel) might be the best for R15.

See these articles for assembly and test:

Battle of the Cheap Line Stages – Part 1 | Wall of Sound | Audio and Music Reviews
Battle of the Cheap Line Stages – Part 3 | Wall of Sound | Audio and Music Reviews
Battle of the Cheap Line Stages, Part 4 | Wall of Sound | Audio and Music Reviews


Steve
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Old 20th September 2019, 02:51 PM   #15
Steve Morley is offline Steve Morley  Canada
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es ( or 2 5 watt in parallel)

EDIT: or two, 5 watt in parallel
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Old 20th September 2019, 02:59 PM   #16
qguy2000 is offline qguy2000
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Thanks !!!

This is the resistor that came with the kit, wattage was not stated in the plastic bag that came with it

r15 resistor - Imgs.info
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Old 20th September 2019, 03:02 PM   #17
Steve Morley is offline Steve Morley  Canada
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If you spin vinyl and are feeling brave the Broskie Tetra phono pre is a good project.

Fist of five parts detailed here:

DIY All-Tube Phono Preamp Project: It’s on! | Wall of Sound | Audio and Music Reviews

Steve
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Old 20th September 2019, 03:09 PM   #18
qguy2000 is offline qguy2000
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Tried vinyl a few years ago and found out that I could not live without the skip button

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Originally Posted by Steve Morley View Post
If you spin vinyl and are feeling brave the Broskie Tetra phono pre is a good project.

Fist of five parts detailed here:

DIY All-Tube Phono Preamp Project: Itís on! | Wall of Sound | Audio and Music Reviews

Steve
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Old 20th September 2019, 03:17 PM   #19
Steve Morley is offline Steve Morley  Canada
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Might be a five watt resistor, might only be a three. It will get warm. The ones I used were wirewound so they are "meant" to get hot. If the one with the kit burns up you'll know you need something with a higher wattage rating. As a tip for next time keep this resistor up off of the board about an inch to aid it heat dissipation.

Also, it's a good idea to solder the component leads on both sides of the board whenever possible. I like to keep the large diodes above the board a bit too as they can get a bit warm.

S.
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Old 20th September 2019, 03:26 PM   #20
qguy2000 is offline qguy2000
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Thanks for all the tips.
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