Build Your Own Clone Message Board

It is currently Thu Mar 28, 2024 11:34 pm

All times are UTC - 6 hours




Post new topic Reply to topic  [ 6 posts ] 
Author Message
PostPosted: Sat Sep 09, 2017 1:06 pm 
Offline

Joined: Sat Apr 12, 2014 9:12 pm
Posts: 64
I bought a bunch of stuff and I'm sure I was sober, but I ended up with a MOSFET Conversion Kit. I think maybe I thought it could be used for my MOSFET Boost. Nope!
I see it referenced under the Overdrive 2 description, but I don't have one of those. Is there another project that these components would be useful for? Build an OD on a bread board probably?


Sent from my SM-G930T using Tapatalk


Top
 Profile  
 
PostPosted: Sat Sep 09, 2017 1:24 pm 
Offline
Moderator
User avatar

Joined: Tue Jan 02, 2007 1:24 pm
Posts: 16196
Location: Albany, NY
The function of that kit is to convert five different elements of the OD2 from their stock configuration to MOSFET-based alternatives. You can read the specifics in the second half of THIS POST from my OD2 FAQ thread. Four of these work in the overdrive stage of the OD2, so would be potentially applicable to any Tube Screamer circuit clone. The fifth applies to the boost stage of the OD2 and converts it from the classic EHX Linear Power Booster circuit, which uses a standard bipolar junction transistor (BJT), to a MOSFET boost. The latter does not have as much drive as the LPB circuit, but has more top-end "sparkle", if that's how you like your boosts to sound. Refer to the OD2 schematic to see how these conversion parts integrate with the overdrive and boost circuits.

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


Top
 Profile  
 
PostPosted: Sat Sep 09, 2017 2:24 pm 
Offline

Joined: Sat Apr 12, 2014 9:12 pm
Posts: 64
duhvoodooman wrote:
The function of that kit is to convert five different elements of the OD2 from their stock configuration to MOSFET-based alternatives. You can read the specifics in the second half of THIS POST from my OD2 FAQ thread. Four of these work in the overdrive stage of the OD2, so would be potentially applicable to any Tube Screamer circuit clone. The fifth applies to the boost stage of the OD2 and converts it from the classic EHX Linear Power Booster circuit, which uses a standard bipolar junction transistor (BJT), to a MOSFET boost. The latter does not have as much drive as the LPB circuit, but has more top-end "sparkle", if that's how you like your boosts to sound. Refer to the OD2 schematic to see how these conversion parts integrate with the overdrive and boost circuits.
Neat! I have an 808 clone I'll mess with. I can't stand the midrange boost in it. I wanted a stock one to see what the fuss was about, but now it's going back to the bench!

Sent from my SM-G930T using Tapatalk


Top
 Profile  
 
PostPosted: Sat Sep 09, 2017 2:25 pm 
Offline

Joined: Sat Apr 12, 2014 9:12 pm
Posts: 64
mrdavenixon wrote:
duhvoodooman wrote:
The function of that kit is to convert five different elements of the OD2 from their stock configuration to MOSFET-based alternatives. You can read the specifics in the second half of THIS POST from my OD2 FAQ thread. Four of these work in the overdrive stage of the OD2, so would be potentially applicable to any Tube Screamer circuit clone. The fifth applies to the boost stage of the OD2 and converts it from the classic EHX Linear Power Booster circuit, which uses a standard bipolar junction transistor (BJT), to a MOSFET boost. The latter does not have as much drive as the LPB circuit, but has more top-end "sparkle", if that's how you like your boosts to sound. Refer to the OD2 schematic to see how these conversion parts integrate with the overdrive and boost circuits.
Neat! I have an 808 clone I'll mess with. I can't stand the midrange boost in it. I wanted a stock one to see what the fuss was about, but now it's going back to the bench!

Sent from my SM-G930T using Tapatalk
Or would the 808 be appropriate? I also have an OD-1 that might head back to the bench.

Sent from my SM-G930T using Tapatalk


Top
 Profile  
 
PostPosted: Sat Sep 09, 2017 2:28 pm 
Offline

Joined: Sat Apr 12, 2014 9:12 pm
Posts: 64
mrdavenixon wrote:
mrdavenixon wrote:
duhvoodooman wrote:
The function of that kit is to convert five different elements of the OD2 from their stock configuration to MOSFET-based alternatives. You can read the specifics in the second half of THIS POST from my OD2 FAQ thread. Four of these work in the overdrive stage of the OD2, so would be potentially applicable to any Tube Screamer circuit clone. The fifth applies to the boost stage of the OD2 and converts it from the classic EHX Linear Power Booster circuit, which uses a standard bipolar junction transistor (BJT), to a MOSFET boost. The latter does not have as much drive as the LPB circuit, but has more top-end "sparkle", if that's how you like your boosts to sound. Refer to the OD2 schematic to see how these conversion parts integrate with the overdrive and boost circuits.
Neat! I have an 808 clone I'll mess with. I can't stand the midrange boost in it. I wanted a stock one to see what the fuss was about, but now it's going back to the bench!

Sent from my SM-G930T using Tapatalk
Or would the 808 be appropriate? I also have an OD-1 that might head back to the bench.

Sent from my SM-G930T using Tapatalk
I clicked the link and answered my own question. A response would still be cool

Sent from my SM-G930T using Tapatalk


Top
 Profile  
 
PostPosted: Sun Sep 10, 2017 12:27 pm 
Offline
Moderator
User avatar

Joined: Tue Jan 02, 2007 1:24 pm
Posts: 16196
Location: Albany, NY
I would recommend making the changes on the 808 clone, but the Boss OD-1 (if you have the 8-pin dual op amp version) is very nearly the same circuit, so you could try that one, too.

Candidly, I wouldn't try the MOSFET op amp swap unless the pedal has the existing op amp in a socket. The MOSFET clipping mod would require either replacing the existing clipping diodes with the MOSFET pair, or going to a switchable set-up on a piece of perf or vero board. Altering the input and output buffers would also be quite a bit of work, since it requires additional components that wouldn't have spaces on the existing PCB. So you really have to ask yourself if it's worth the hassle just to use up the $8 worth of parts in the MOSFET conversion kit....

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 6 posts ] 

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 8 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group