Recent Posts

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1
Microphones / Re: U-67 head assebmly question
« Last post by RuudNL on Today at 03:59:44 AM »
Looks familiar!
Wasn't it under the ground 'pin' of the capsule head?
2
Microphones / Re: Capsule with built in HP filter
« Last post by RuudNL on Today at 03:55:41 AM »
I don't see any LF rolloff of the frequency response in the specifications.
http://www.coutant.org/akgc60/
Frequency response is specified as: 20...20000 cps (within 2.5 dB)
Not sure if this is the same capsule however.
Couldn't it simply be a matter of the tensioning of the diaphragm?
3
Drawing Board / Re: Glossary of Magnetic Terms
« Last post by alexc on Today at 03:34:15 AM »
Nice !
4
Dynamic Processors / Re: Feeler: Classic Stockli Knobs groupbuy
« Last post by tony hunt on Today at 02:36:31 AM »
Yes interested.
Are they bakelite or plastic?
Minimum order means just that, or ist it a minimum order of €80 for one type with lead in time for manufacture?
thanks.
5
Filters/Equalizers / Re: sontec 1 RU build thread
« Last post by Harpo on Today at 02:33:35 AM »
Paul, yepp, in cell C23 of 'SontecCalc_Igor.xls' you fill in the number of wanted step positions (in your case '11') and simply overwrite the evenly divided calculated frequencies in cells D26 ... H36 with your wanted target frequencies.
Just as a reminder, don't miss the sentence 'Update the cap.values in the red cells with measured real world capacitance of your fitted parts.'
6
The Lab / Re: Capacitors replacement for tube stage
« Last post by Breezio on Today at 02:03:25 AM »
bulky unknown cap
7
The Lab / Re: Capacitors replacement for tube stage
« Last post by Breezio on Today at 01:59:47 AM »
mundorf cap
8
The Lab / Re: Capacitors replacement for tube stage
« Last post by Breezio on Today at 01:59:12 AM »
russian cap
9
The Lab / Capacitors replacement for tube stage
« Last post by Breezio on Today at 01:58:20 AM »
Dear community,

I am reviewing an old modification (very poorly executed…) that was done on the two tubes modules representing the final stage of my hybrid AMC CVT3030 amp.

I don’t have those modules anymore and I am thinking of applying the same mod to the present ones since it’s only about replacing four capacitors and one resistor.

I highlighted in the schematics the components that were changed and I am adding also some pictures.

Could you please take a look, possibly indicate if the changes make sense to you and which capacitors I should buy?

For instance, I could not find online the green Russian caps but I’m sure there are good alternatives.

C507: 10k100 white bulky cap, no idea what that is
C502: 3u3 400vdc +/- 3% Mundorf MCAP
R520: 12k
C505 / C506: K71-7 0,1 mk +/- 2% 250B8604 green Russian caps

Thanks a lot in advance

Fabrizio
10
Filters/Equalizers / Re: G-PULTEC problems, please help!
« Last post by weiss on Today at 01:53:10 AM »
The capacitors in series with the inductor and Q-pot controls the frequencies of high-boost

Smaller capacitor => higher frequency

Jakob E.

thanks, you solved it!
it was indeed too small ::) ::)
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