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Modulus-86  build thread
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Old 1st November 2020, 06:46 PM   #5291
hunterst is offline hunterst  Spain
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What kind of wires are recommended for connecting the transformer inputs and outputs, the power module and the amplifier modules?

I sourced some AWG20 and AWG18 cables from an old tower PC but I don't know if the gauge is big enough and if solid core is preferred over stranded.

Also, from what I understand the transformer input and output should be twisted and preferably shielded.

Thanks!
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Old 2nd November 2020, 06:14 AM   #5292
tomchr is offline tomchr  Canada
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Stranded vs solid: Meh. The electrons won't care, so use what you have handy. I prefer stranded because I find it easier to work with.

20 AWG would be perfect for the input, but is a bit skinny for the power supply and speaker connections. Some (me included) would prefer shielded cable on the input, though. I generally use microphone cable for this, though in my most recent build I used star quad cable.

I generally use AWG 16 for the speaker connections. Some may prefer heavier gauges. You can always use 2-3 18 AWG in parallel and just zip tie them together.

The wires on the transformer itself are generally long enough to reach. They need to be tightly coupled. I run them parallel and zip tie them together. I doubt you'd be able to get a tighter coupling if you twisted or braided them together.

Tom
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Last edited by tomchr; 2nd November 2020 at 06:27 AM.
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Old 2nd November 2020, 07:45 AM   #5293
hunterst is offline hunterst  Spain
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Awesome, thanks Tom!
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Old 27th November 2020, 07:26 AM   #5294
Thepinguin is offline Thepinguin
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Hello to all, long time i did not share, neither did i progress on my project due to unexpected events

Project is double mono mod86

I was going on using a smps300rah 30V per each mod86 amp



Would the SMPS240QR 30V be Ok? Instead of the smps300rah?

What would be thz difference?

Thanks
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Old 27th November 2020, 07:52 AM   #5295
Thepinguin is offline Thepinguin
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Also, i olan to use a alps rk27 connected to the RCA inputs ( so directly to a dac) to control volume, is it problematic? Impedance level or so?
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Old 27th November 2020, 06:56 PM   #5296
sq225917 is offline sq225917  United Kingdom
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Nope, no issue
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Old 27th November 2020, 08:13 PM   #5297
Thepinguin is offline Thepinguin
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Grace mille, so i can go route of control volume with alps rk27 connected to rca

What about differences between smps300reh and smps240qr , both in 30v?
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Old 27th November 2020, 09:22 PM   #5298
Thepinguin is offline Thepinguin
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Sorry push .. its black friday and smps240qr is currently on sale .. i need two

Originaly, i was planning on two smps300eeh @85 euro each .. so 170 boths ..

Smps240qr now sale for 45 each until sunday .. so thats a nice saving over my original plan

But i just dont know if they ok since i read on this thread that smps300reh was suitable
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Old 27th November 2020, 09:33 PM   #5299
TannoyGRFpro is offline TannoyGRFpro  New Zealand
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I used the SMPS 240 in my mono 86's and they seem fine. Quite and small so easy to put in small enclosures. No idea if the 300's would have been better though. Photos and more info my construction in earlier posts.
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Old 27th November 2020, 11:32 PM   #5300
Thepinguin is offline Thepinguin
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Ok, sounds fine to me if someone uses the smps240qr

Unless someone raise hand before sunday and inform its better to fo with two smps300reh ,i'll go with a 240qr per channel

Thanks
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