HeadWize: DIY Workshop > β24: A discrete, cascoded, fully-differential power amplifier

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DIY Workshop » β24: A discrete, cascoded, fully-differential power amplifier
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fc911c

Member

Joined: Jun. 6, 2008
Locale: N/A
Total Posts: 49

Message [#360] posted on: 02-20-2009 12:00 AM CST (US).

[Quoting amb]
That's correct. It's a custom-made transformer, so it doesn't have a regular part number. Just call/write Richard Sumner and tell him what you need.

Is that the printed circuit board type you have AMB?

amb

Headphone Council

Joined: Apr. 1, 2004
Locale: Sunnyvale, CA. USA
Total Posts: 4408

Message [#361] posted on: 02-20-2009 03:29 PM CST (US).

[Quoting fc911c]
Is that the printed circuit board type you have AMB?

Yes, except I mounted it to an aluminum plate rather than a PCB.

fc911c

Member

Joined: Jun. 6, 2008
Locale: N/A
Total Posts: 49

Message [#362] posted on: 02-21-2009 02:31 AM CST (US).

[Quoting amb]
[Quoting fc911c]
Is that the printed circuit board type you have AMB?

Yes, except I mounted it to an aluminum plate rather than a PCB.

I have two other questions as I plan on building my B24 just like yours. Do the wires come out of the side or bottom?

Did you have the legs and plates for mounted transformers and large Caps fabricated?

Thanks
Frank

amb

Headphone Council

Joined: Apr. 1, 2004
Locale: Sunnyvale, CA. USA
Total Posts: 4408

Message [#363] posted on: 02-21-2009 04:23 AM CST (US).

[Quoting fc911c]
I have two other questions as I plan on building my B24 just like yours. Do the wires come out of the side or bottom?

Side (see the two bundles coming out of the left)::

[Quote]
Did you have the legs and plates for mounted transformers and large Caps fabricated?

Yes. Front Panel Express.

fc911c

Member

Joined: Jun. 6, 2008
Locale: N/A
Total Posts: 49

Message [#364] posted on: 02-21-2009 03:49 PM CST (US).

Ok Thanks for the information.

housing

HeadWizer

Joined: Dec. 16, 2006
Locale: N/A
Total Posts: 163

Message [#365] posted on: 02-25-2009 02:59 AM CST (US).

Hi Ti,

Will there be any RF interference using solid state relay as switch? Thanks.

amb

Headphone Council

Joined: Apr. 1, 2004
Locale: Sunnyvale, CA. USA
Total Posts: 4408

Message [#366] posted on: 02-25-2009 06:44 AM CST (US).

[Quoting housing]
Will there be any RF interference using solid state relay as switch?

No, there shouldn't anything operating at RF frequencies inside a solid state relay.

fc911c

Member

Joined: Jun. 6, 2008
Locale: N/A
Total Posts: 49

Message [#367] posted on: 03-14-2009 05:59 PM CST (US).

can someone tell me what that part is to the right of the SummR transformer?

Thanks

[Quoting amb]
[Quoting fc911c]
I have two other questions as I plan on building my B24 just like yours. Do the wires come out of the side or bottom?

Side (see the two bundles coming out of the left)::
[Quote]
Did you have the legs and plates for mounted transformers and large Caps fabricated?

Yes. Front Panel Express.

amb

Headphone Council

Joined: Apr. 1, 2004
Locale: Sunnyvale, CA. USA
Total Posts: 4408

Message [#368] posted on: 03-14-2009 09:56 PM CST (US).

That's a solid state relay, driven by the ε24 powert switch driver circuit.

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