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 NEW  Matt presents bias and operation data for the 6V6 tube in SE operation - 6V6 Single-Ended (SE) Ultra Linear (UL) Bias Optimization.

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 Post subject: Re: Cheapest tweek ever
PostPosted: 09 May 2013, 18:32 
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Joined: 09 May 2013, 18:25
Posts: 1
Location: London
Dear Todd - if I shipped you a 935 BX would you be willing to do the mods for me for a suitable fee?!
Best, Richard in London


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 Post subject: Re: Cheapest tweek ever
PostPosted: 10 May 2013, 23:08 
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Joined: 06 Jun 2008, 18:23
Posts: 5268
Location: Australia
I'm with Gio, adding snubber caps gets the diodes even quieter. Usually I use 0.01uf polies. Another trick I have used is after a rec. bridge put one fast diode in the positive line before any smoothing caps. Supposedly the one diode will make the bridge act like it is made from fast diodes.

And speaking of snubbers, I usually put 0.1uf polies across all electros in the PS.

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 Post subject: Re: Cheapest tweek ever
PostPosted: 04 Nov 2013, 23:20 
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Joined: 08 Aug 2013, 03:49
Posts: 7
Location: South Africa
Must the diodes be MUR420 or can one use equivalents?

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 Post subject: Re: Cheapest tweek ever
PostPosted: 28 Feb 2020, 11:43 
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Joined: 28 Feb 2020, 11:13
Posts: 1
VERY interested in other Rotel applications! eg Rotel RB 980/981. The 985 may be too tight but I’m good w/cutting my teeth on the two-channel gear first.

Thanks in advance for reading this far and help! Tony


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 Post subject: Re: Cheapest tweek ever
PostPosted: 20 Jul 2020, 12:18 
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Joined: 20 Jul 2020, 08:14
Posts: 2
Hi Todd,
I’m having a bit of trouble with my NAD 325BEE needing a bit of smoothing like that: do you think this would work on this amp? (I have read that there are no caps in the signal path on the 325BEE so I’m guessing changing a couple of caps is not an option for me. Hence my interest in what you did.
Pete


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 Post subject: Re: Cheapest tweek ever
PostPosted: 25 Jul 2020, 21:35 
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Joined: 23 Feb 2017, 02:02
Posts: 669
It can be any sckotty diode as long as the current and voltage rating is high enough that it wont die.

If your looking at HF applications then you also need to look the diode capacitance, but not for audio


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