Recent Posts

Pages: [1] 2 3 ... 10
1
General Questions / Re: Replacing tubes
« Last post by flanagan0718 on Today at 08:17:04 PM »
Thanks for all the advice guys! Iíve done a bit of research and find that the amp does not have an adjustable bias. Iíll definitely open it up and check the solder joints and see if there are any iffy ones in there. Going on the fact that I have owned this amp for 6 years now and never replaced the power tubes, Iím thinking it may be a good idea to just plop a new set in there anyways. There are quite a few options for the 6l6 out there. Iíve always heard good things about JJ and Ruby. I also found a set of Peavey tubes too. Assuming they are all pretty similar I may go with the Peavey tubes or the JJ like other have recommended. Still looking for input, feel free to post it.


Sent from my iPhone using Tapatalk
2
General Questions / Re: Replacing tubes
« Last post by gordo on Today at 07:38:20 PM »
Big JJ fan here but like ahiddentableau mentioned I wouldn't overlook an iffy solder joint somewhere, or even an oxidized jack.  Input jacks and, especially if you don't use them, the fx loop jacks are worth looking at.  If you can duplicate it and tap/push the circuit board with a chopstick it might point you in the right direction.

Or like you say it might be tubes...  The Prowler doesn't have adjustable bias so buying a matched pair of anything should just be plug and play.  It can be modded to include a bias adjustment but having done a bunch of Fender Blues Jr to "open up the tone" (customer's words) I don't know that I'd spend the time or money.  Prowler and the later ValveKing's are nice sounding amps.
3
Global Annoucements / Re: Coming up: BOTY contest
« Last post by madbean on Today at 06:18:57 PM »
4
Open Discussion / Re: Re Heads Up
« Last post by K3yPr0gg3r on Today at 06:11:59 PM »
Thanks for the replies! Yes, it was a new site glitch. Got a message that my stuff is sitting in Customs now, but it's on the way. I usually limit my overseas purchases to vendors I trust, (Paul: DIY Guitar Pedals, Fuzz Dog PCBs, etc), but they are one of two places that carry the ME4004, and I love the sound!

Thanks again!!
5
Build Reports / Re: 2019 Prototyping board WIP
« Last post by madbean on Today at 05:38:45 PM »
Is it based on Kitchen cutting board???

Indeed. All the ones I've ever built were on cutting boards.

Almost done hooking it up. Decided to move all the Arduino stuff to a separate board so this one will be focused on analog pedal design. Scope is working fine. I still may add a little headphone amp for late night/early morning listening.

One thing I really need to do is make a little board with a switch to power on the scope and signal generator. Since I can run 9, 15, 18 and -9v to the breadboard with a rotary switch on the 1590B at the top right, I don't want to accidentally send the wrong power to those and damaged them. So, I may use a separate PSU just for those or use a protection diode and 9.1v Zener.

6
General Questions / Re: Replacing tubes
« Last post by Aleph Null on Today at 04:51:11 PM »
I wouldn't expect to hear drastic differences between tubes or brands. Most tubes come from the same two or three factories. More "reputable" brands are usually better tested, so you should be less likely to get something out of spec. JJs and Electro Harmonix have both worked fine for me. Definitely determine whether the amp needs to be rebiased. If you take it to a tech to bias it, then you I'd buy my tubes from them.
7
Open Discussion / Re: Me = Super Dumb
« Last post by EBRAddict on Today at 10:07:40 AM »
Let that be a lesson to all of us, lest we forget the protection diode at the power input of our designs...
8
Open Discussion / Re: Re Heads Up
« Last post by EBRAddict on Today at 10:06:06 AM »
Maybe they used your $22+ to hire some 8th grader to update their website?

No, they hired the same people who designed the site https://www.goldmine-elec-products.com/

Many places were selling in catalogs and trade rags long before Marc Andreessen was a twinkle in his father's eye. They wouldn't front a bunch of money for a complete redesign of their sites--the web is just a fad, you know--and just "lift & shift" the content from print publication to the web.

9
Open Discussion / Re: Me = Super Dumb
« Last post by TFZ on Today at 09:01:48 AM »
In almost all cases the sleeve is the negative for other appliances. Only guitarists are stupid enough to put the positive voltage outside ::).
10
General Questions / Re: Death CLaw delay problem!!??
« Last post by Spenzerleehorton on Today at 05:58:49 AM »
this effect is a total loss at the moment!!!
i have removed Q3 and the surrounding caps and resistors along with switch as advised on pdf as i just want a simple delay pedal.
there seems to be signal both sides of R7 and signal at one leg of R13.
But apart from that i don't see any signal getting to IC2 or IC3?
Voltages look ok on both IC2 and IC3 apart from pin 7 on IC2 which is 1.7v.

bit stuck on how to progress with this one?
Pages: [1] 2 3 ... 10