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#1
General Questions / Help with Vref
Last post by garfo - November 23, 2024, 08:27:07 PMA very simple question regarding Vref and an extra opamp I have laying around on a circuit I'm working on.
I have an opportunity to use this spare opamp and was thinking of using it for Vref.
At the moment, for the Vref, I am using 2x 22k resistors with a 47uf filtering capacitor. My question is, if I add the opamp, can the resistors value be the same or would I need to adjust their values?
I have an opportunity to use this spare opamp and was thinking of using it for Vref.
At the moment, for the Vref, I am using 2x 22k resistors with a 47uf filtering capacitor. My question is, if I add the opamp, can the resistors value be the same or would I need to adjust their values?
#2
General Questions / Re: 1/4 mono jack with switchi...
Last post by jwin615 - November 23, 2024, 07:18:44 PMWhat not use a pedal and have the 3pdt being the FX loop in/out of the path. Add 2 pots, one in each loop.
FX loop pot attenuates before the FX so the preamp doesn't push your pedals too hard
The other pot just attenuates when loop is bypassed. It's still just 2 cables to/from the amp and let's you switch the loop in and out and level match. You could obviously do this on the amp with a toggle too.
Either way, use ISOLATED jacks or you could get a ground loop if the amp and pedals end up on different circuits.
I would start with isolated jacks and don't connect a ground to them, letting the amp handle the cable grounding.
FX loop pot attenuates before the FX so the preamp doesn't push your pedals too hard
The other pot just attenuates when loop is bypassed. It's still just 2 cables to/from the amp and let's you switch the loop in and out and level match. You could obviously do this on the amp with a toggle too.
Either way, use ISOLATED jacks or you could get a ground loop if the amp and pedals end up on different circuits.
I would start with isolated jacks and don't connect a ground to them, letting the amp handle the cable grounding.
#3
General Questions / 1/4 mono jack with switching
Last post by jimilee - November 23, 2024, 02:11:52 PMQuote from: redkurn on November 23, 2024, 06:09:02 AMNice! I keep thinking I'll sell mine, but so far, I can't bring myself to do it.Quote from: jimilee on November 22, 2024, 04:39:39 PMWhy not build something like the JHS black box (just an example for a visual)and put the effects after, or did you want something with a volume pot to sit on top of the amp?
Sent from my iPhone using Tapatalk
I already have, but I need to rebox it, so might as well upgrade it. After 3 years it's coming back home with the amp I let go of. Get them both back tomorrow.
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#4
General Questions / Re: 1/4 mono jack with switchi...
Last post by redkurn - November 23, 2024, 06:09:02 AMQuote from: jimilee on November 22, 2024, 04:39:39 PMWhy not build something like the JHS black box (just an example for a visual)and put the effects after, or did you want something with a volume pot to sit on top of the amp?
Sent from my iPhone using Tapatalk
I already have, but I need to rebox it, so might as well upgrade it. After 3 years it's coming back home with the amp I let go of. Get them both back tomorrow.
#5
General Questions / Re: 1/4 mono jack with switchi...
Last post by jimilee - November 22, 2024, 04:39:39 PMWhy not build something like the JHS black box (just an example for a visual)and put the effects after, or did you want something with a volume pot to sit on top of the amp?
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
#6
General Questions / Re: 1/4 mono jack with switchi...
Last post by mauman - November 22, 2024, 02:12:33 PMWelcome back! If you can post a sketch of how you want to connect it in your signal chain, we can make some recommendations on which jack(s) will do it for you, I've built a few boxes like you describe. In the mean time, here are the various switching configs available in Switchcraft (pdf file) and Neutrik (png file.)
#7
Open Discussion / Re: USPS imploding?
Last post by mauman - November 22, 2024, 02:01:07 PMHey, I'm sorry to hear about that. I ship via USPS lot, and I've had some packages do strange things. One day a substitute carrier picked up an outgoing box at my house, and mistakenly scanned it "delivered" instead of "picked up." So for the entire trip, I couldn't see the status and had to call the helpline and have them look at it. It was handled and delivered as usual, I just couldn't see it online. Another time a package went back and forth between two cities several times, I called the helpdesk and they said yeah, we call that looping, it happens sometimes. They called the postmaster at one of the cities, who intercepted the package and rerouted it directly to the destination the next day. Try calling 800-275-8777 first thing in the AM or right after lunch, the USPS national helpdesk is quite customer-focused. I used to live next door to one of their supervisors, and she was really focused on quality and customer experience.
#8
Open Discussion / Re: USPS imploding?
Last post by lars - November 22, 2024, 12:33:51 PMQuote from: mauman on November 21, 2024, 03:12:00 AMSince 2020, it's been run by a Postmaster General who's done his darndest to kill it so that the services can be privatized. So far he's failed, but he has dealt some crippling blows including shutting down several major sorting and distribution centers nationwide.This makes me feel all warm and fuzzy! Good, grief! Anyway, that package that disappeared on me finally blipped for a short while yesterday. They even claimed it was "out for delivery". But nothing ever happened. Now it says it will most likely be delivered today...or tomorrow...or maybe next year.
Now they're just messing with people!
#9
General Questions / 1/4 mono jack with switching
Last post by redkurn - November 22, 2024, 07:43:15 AMLong time no post, think about you guys every time I plug in one of my mad pedals. 😉
I've got a little project I may be working on that's a very simple box and I want to make sure I select the appropriate jack to handle switching the path of the signal to a cable plugged in or continue on to the output.
Basically I am making essentially a fx loop box to tame a hot rod deluxe, but am going to affix it with Velcro and want to add a send and return to the box.
Have yet to decide if the pot should be first, but I think it should be, goal is to tame the pre amp and let the rest of the signal continue onward, but also add fx and not reduce their volume.
Aiming for compact and no cables except those going to pedals.
I've got a little project I may be working on that's a very simple box and I want to make sure I select the appropriate jack to handle switching the path of the signal to a cable plugged in or continue on to the output.
Basically I am making essentially a fx loop box to tame a hot rod deluxe, but am going to affix it with Velcro and want to add a send and return to the box.
Have yet to decide if the pot should be first, but I think it should be, goal is to tame the pre amp and let the rest of the signal continue onward, but also add fx and not reduce their volume.
Aiming for compact and no cables except those going to pedals.
#10
Open Discussion / Re: Harbinger CDS cells
Last post by madbean - November 22, 2024, 01:12:36 AMThe 9203 @ smallbear are pretty good.
https://smallbear-electronics.mybigcommerce.com/photocells-cds-5mm-diameter/
Not quite the 50M off resistance of the specially tuned photocells they used to have, but those have not been available for a while. I've used them in a couple Univibe builds with success.
https://smallbear-electronics.mybigcommerce.com/photocells-cds-5mm-diameter/
Not quite the 50M off resistance of the specially tuned photocells they used to have, but those have not been available for a while. I've used them in a couple Univibe builds with success.