Hermida Audio - Zendrive [ goop-alarm ]  [traced]

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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby roseblood11 » 04 Oct 2011, 08:57

most likely Panasonic. But they're standard metalized polyester film caps, you won't hear any difference if you use cheaper ones. You don't need any "hifi" or mojo parts. Don't forget that the purpose of an overdrive circuit is to mistreat the signal...
The fact that a self appointed pedal guru uses certain parts is totally irrelevant. It only proves that they look sexy/expensive/whatever... The Panasonics have two real advantages if you want to mod an existing pedal: They are very small and they have long legs, so you can use them even if the spacing of the holes in the pcb is different.
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby andregarcia57 » 25 Apr 2012, 17:44

there are differences between the AD712?

AD712JN
AD712KR
AD712JR
AD712KN

I can use any of the project?
prices are very high, where to buy? (off ebay)
thanks
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby mmolteratx » 26 Apr 2012, 05:32

andregarcia57 wrote:there are differences between the AD712?

AD712JN
AD712KR
AD712JR
AD712KN

I can use any of the project?
prices are very high, where to buy? (off ebay)
thanks


It's always a safe bet that it doesn't matter what the end letters are in a pedal. I buy mine from Newark. http://www.newark.com/analog-devices/ad ... -4mhz-20v-µs-dip-8/dp/59K4554?in_merch=Popular%20Amplifiers%20And%20Comparators
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby andregarcia57 » 27 Apr 2012, 20:57

ilpfis wrote:Hi,
What is the manufacturer of this capacitors those red in the picture? they are very similar to those used analogman or robert keeley.
Thanks

Image




what is the diode GE? D1, D2 or D3?
in the photo are two BAT41 and one GE, I see right?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby andregarcia57 » 28 Apr 2012, 14:30

This schematic tube Zen Drive 2 is correct?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Frabbio » 28 Apr 2012, 15:07

I don't know if it's correct, but you have to really hate tubes to use them that way! Anodic tension = 9 volt and no cathode resistors/cap...
i would stick with the first version, the germanium diode is D2.
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby aegert » 14 May 2012, 16:43

gsb wrote:HI !
I send also two eagle files from board and dpd -pcb .
gsb[url][url=http://www.shrani.si/?3H/zh/2OoxqCwi/gsb-drivesmallfinal.png]Image[/url]Image[/url]


Any chance to buy 2 PCB's?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby pamaz » 17 May 2012, 07:23

andregarcia57 wrote:This schematic tube Zen Drive 2 is correct?

No.
if you the search function you'll get the correct one.
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby okgb » 17 May 2012, 13:09

I didn't see it in the search function [ saw allot of other interesting stuff on zendrives ]
doesn't mean it's not there ................have a hint ?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Seiche » 17 May 2012, 17:40

okgb wrote:I didn't see it in the search function [ saw allot of other interesting stuff on zendrives ]
doesn't mean it's not there ................have a hint ?

http://freestompboxes.org/viewtopic.php?p=26478#p26478 :thumbsup
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby okgb » 17 May 2012, 20:05

Sorry I thought he was talking about the II version
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Seiche » 17 May 2012, 21:12

okgb wrote:Sorry I thought he was talking about the II version

:scratch: he did. and i linked to the changes. I haven't seen a correct schematic for this. But the changes seem pretty slight to be able to adopt the existing version1 schematic.
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Re: "If anyone knows of such a thing.."

Postby powmat » 06 Jul 2012, 20:47

Hey MKB,

First, let it be said that I have only built a couple of stompboxes..but in 40+ years of 'spanking the plank' in every conceivable type of band, I have owned/played/borrowed a bunch of gear. Also, have not ever played a Dumble. I do own and use, 70's era MXR Distortion +, Newer OCD+, '72 Marshall 50W, '71 Twin Reverb, and a butt-load of digital effects. Loud rock bands, Swing bands, Country-Prog-Jazz-rock-Blues, you know the drill...


That said -regarding your request: "If anyone knows of such a thing.."
I recently built an 'umble' from Runoffgroove ( http://www.runoffgroove.com/umble.html).. I really like it. Good tonal range, from just sorta boosted, to touch-sensitive saturated distortion with chirpy harmonics.... Has a full tone-stack. I have found myself using it at lower gain settings pretty much all the time to shape the tone of whatever I am plugged into at the moment. In fact am going to build a second so I can switch between 'rawish-not-really-crunched-out-but-ballsy' - and full-on boosted-distortion...

Some reviewers have stated that they found it 'noisy'...Mine is about as noisy as my OCD at similar volumes/settings. You may want to scope it out..

Just saying...

I am planning to do a Z-drive next, so its not like my G.A.S. has disappeared or anything, but I like the umble....

Cheers,

Matt Powell
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Deny » 16 Jul 2012, 02:31

Just built a Zendrive using Rick Holt's layout, AD712 IC, 2x BAT41 and 1x1N34A (which is quite different from using a 1N60 BTW), and it sounds *really good* and is very quiet, so thanks to everyone who cooperated in making this project possible :)
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Manfred » 24 Jul 2012, 21:06

Does somebody identify the Zendrive 2 opamp, is that the same as in the Zendrive 1 is?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby grrrunge » 08 Aug 2012, 19:20

Just a heads up:
I built the v.1 today using HBO's layout: http://www.sabrotone.com/?p=755
I used 1n34a's instead of bat41's and a lm833 - sounds awesome! way better than the kit from musikding i built a year ago... 8)
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby andregarcia57 » 02 Sep 2012, 15:49

is to add a boost. similar to amplifier?
what is the ideal?
thanks
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby algorythm » 16 Sep 2012, 23:20

Hello! Please could anybody that has already built the Rick Holt's (frequencycentral) layout tell me the exact dimensions PCB should have?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby andregarcia57 » 03 Nov 2014, 18:46

hello guys ...
any idea to add a switch mid boost in zendrive?
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Re: Hermida Audio - Zendrive [ goop-alarm ]

Postby Dr Bertson » 06 Jan 2015, 19:51

Hello!

I have built the Zendrive now using the layout on this thread.
I tried with different IC's, but the best sound I got with the OPA2134 and instead of 2N7000, I used BS170.
The sound of my pedal is very close to thenoriginal Zendrive.
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