grounded potmeter - where to find

C8lcifer · 15th April 2008, 11:25 PM

Hi

i am currently working on a heavy project, building the rane me60s graphic equalizer
me60s

on page 7 and 8 of the circuit you'll find that the faders for the filter gain consist of 6 contacts (contacts 5 and 6 are all to be found in the right upper corner)
schematic

contact 4 is grounded, which divides the potmeter in 2 halves (up and down)
which company produces such fader or do i interpret them wrong?

thx for all help and grtz
stijn

Rodeodave · 16th April 2008, 12:39 AM

search for "loudness tap"

Seems like Alps makes/made 'em.

http://brigarelectronics.com/mm5/mer...ategory_Code=P

C8lcifer · 16th April 2008, 02:48 PM

i am looking for faders, not turnable potmeters
asked someone who has experience over 20 years mostly televisions and he has never seen anything like this, Rane claims that they invented the constant Q bandpass filtering, so that man suggested those might be custom made

send a mail to Rain but had no reply yet

nobody?

David Davenport · 18th April 2008, 02:33 AM

The grounded pin on the fader is called a "hopoff" point. Penny & Giles makes faders with hopoff connections.

Dave

C8lcifer · 18th April 2008, 11:22 PM

thx a lot david

Rane replied and they do use center grounded faders but did not tell me from what company

but it should also work with a normal fader, because of the accuracy of only 20%, even when centered, the filter will be active in boost or cut mode, so i'm gonna use bourns faders with a center detent, they will do the job

15th April 2008, 11:25 PM	#1
C8lcifer diyAudio Member Join Date: Apr 2008	grounded potmeter - where to find Hi i am currently working on a heavy project, building the rane me60s graphic equalizer me60s on page 7 and 8 of the circuit you'll find that the faders for the filter gain consist of 6 contacts (contacts 5 and 6 are all to be found in the right upper corner) schematic contact 4 is grounded, which divides the potmeter in 2 halves (up and down) which company produces such fader or do i interpret them wrong? thx for all help and grtz stijn

16th April 2008, 12:39 AM	#2
Rodeodave diyAudio Member Join Date: Dec 2004 Location: in the alps Blog Entries: 1	search for "loudness tap" Seems like Alps makes/made 'em. http://brigarelectronics.com/mm5/mer...ategory_Code=P __________________ Gravity - Making the G since 13.7 billion B.C.

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16th April 2008, 02:48 PM	#3
C8lcifer diyAudio Member Join Date: Apr 2008	i am looking for faders, not turnable potmeters asked someone who has experience over 20 years mostly televisions and he has never seen anything like this, Rane claims that they invented the constant Q bandpass filtering, so that man suggested those might be custom made send a mail to Rain but had no reply yet nobody?

18th April 2008, 02:33 AM	#4
David Davenport diyAudio Member Join Date: Jun 2004 Location: Raleigh North Carolina	The grounded pin on the fader is called a "hopoff" point. Penny & Giles makes faders with hopoff connections. Dave

18th April 2008, 11:22 PM	#5
C8lcifer diyAudio Member Join Date: Apr 2008	thx a lot david Rane replied and they do use center grounded faders but did not tell me from what company but it should also work with a normal fader, because of the accuracy of only 20%, even when centered, the filter will be active in boost or cut mode, so i'm gonna use bourns faders with a center detent, they will do the job

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