Black Discus revisited

Tweakers' Asylum

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Posted by unclestu (D) on October 25, 2013 at 15:33:34

Got in a fair number of BDs. and have been experimenting.

I am amazed at the cumulative differences of placing more BD in your system.

They work well on my Quicksilver Mid Mono amps. Placing a pair on the exposed B+ electrolytic caps makes a noticable difference, more so than on the IEC inlets.

After contacting Bob, who assured me that drilling them wouldn't hurt, I drilled a small hole through the center, making placement of the smaller BD on input tubes easier (you know the 12AX7 types with the nipple on top). The blue tack supplied sort of melts with the heat of the tube, but drilling the hole anchors the disc without the need for Blue Tack.

Works well on the tops of all tubes, more so on the driver tubes of a tube amp. Seems the sonic differences on the amplifier tubes are greater than the preamp tubes. Works well on power tubes also....

I'm sure others will find other applications, BTW, so please chime in.

I do notice the BD takes about 10 minutes minimum to "break in" and even when moving from site to site often requires a break in time. Bass seems a bit more emphasized in the break in period and normal tonality resumes after the break in. Curiously, use of the piezo crystals on top of the BD further anhances the upper frequencies.

OF course YMMV

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Topic - Black Discus revisited - unclestu 15:33:34 10/25/13 (22)

RE: Black Discus revisited - tyu 08:43:26 11/14/13 (0)

RE: Black Discus revisited - xsb7244 16:30:50 10/28/13 (1)

RE: Black Discus revisited - beautox 02:31:41 11/02/13 (0)

RE: Black Discus new hot spot - unclestu 21:38:46 10/27/13 (0)

I got a different result - mcondo 07:07:09 10/27/13 (5)

RE: I got a different result - moray james 16:23:04 10/28/13 (0)

RE: Congestion - Paul_A 09:58:19 10/27/13 (3)

Congestion - My name is Fred 12:22:39 10/27/13 (0)

RE: crystals - unclestu 11:47:02 10/27/13 (0)

RE: Congestion vs "break in"? - unclestu 11:43:56 10/27/13 (0)

RE: Black Discus revisited - vital ital 13:00:02 10/26/13 (2)

RE: Black Discus revisited - Awe-d-o-file 16:40:20 10/26/13 (0)

RE: Black Discus revisited - beautox 15:28:38 10/26/13 (0)

RE: Black Discus revisited - DTF 10:34:26 10/26/13 (2)

Question - Awe-d-o-file 16:45:05 10/26/13 (1)

RE: Question - DTF 23:59:34 10/26/13 (0)

RE: Black Discus revisited - Mike B. 09:55:49 10/26/13 (0)

My freebies... - My name is Fred 17:38:14 10/25/13 (4)

RE: My freebies.... - unclestu 17:43:27 10/25/13 (3)

RE: My freebies.... - Awe-d-o-file 16:53:34 10/26/13 (2)

Break in - unclestu 18:46:50 10/26/13 (1)

RE: Break in - Awe-d-o-file 10:02:18 10/27/13 (0)

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