Rat Ruetz mod on a footswitch

Started by UnholyRiffs, May 14, 2017, 07:46:51 PM

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UnholyRiffs

One last question for you guys as you are real builders, what is you opinion on the compensating cap with a Rat pedal? I'm using a TL071 with the stock cap, but tried a LM741 and a CA3130EZ as well and had good results. Should I remove or adjust that cap with those chips? I really don't feel like paying $5 each for a LM308, but I guess I could try an OP07DP as well.

Thanks again for the kind words as well, starting to feel somewhat normal but I've heard it takes months to completely heal from what I got. More building to put my focus elsewhere.

robthequiet

I guess the test is whether or not you feel the sound needs adjusting. Know when to hold'em, know when to fold'em, yada yada yada...

GGBB

Out of all the chips you've mentioned, only the LM308 has the compensation feature. In other words, the compensation cap doesn't do anything with those chips. There are other single op-amps that have that feature though (at least two that I remember - TL070 - which seems to be extremely scarce - and another I don't recall which had different pins for it - 5 & 8 I think).
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UnholyRiffs

Quote from: GGBB on May 17, 2017, 06:48:42 PM
Out of all the chips you've mentioned, only the LM308 has the compensation feature. In other words, the compensation cap doesn't do anything with those chips. There are other single op-amps that have that feature though (at least two that I remember - TL070 - which seems to be extremely scarce - and another I don't recall which had different pins for it - 5 & 8 I think).

Ok cool, that's what I thought. I wanted to leave it in if he wanted to try a LM308, but at the same time if the cap *did* affect the chip I was going to remove it and just tell him no go with the LM308. I have a LM301 also but it just doesn't have the gain we like.

duck_arse

this won't help you, but .....
QuoteI really don't feel like paying $5 each for a LM308

there's a place in melbourne will sell you a pack of 10 LM308HZ in the metal can for 4.50$. that's NatSemi parts, and our crappy aust dollar.
" I will say no more "

UnholyRiffs

That's rad as hell, thank you for that! Hmmmmm wonder how bad our American dollar is.....doubt any country would want it at our political state hahaha.

UnholyRiffs

I would love to find these suppliers but not sure if this page is a scam haha

https://www.netcomponents.com/results.htm?d=1&t=f&r=1&pn1=LM308

GGBB

There's a local place here in Toronto that has a bin full of 308s for about 12$ each. Directly below is a bin of 208s for about 3$ each.
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UnholyRiffs

Quote from: GGBB on May 18, 2017, 03:10:58 PM
There's a local place here in Toronto that has a bin full of 308s for about 12$ each. Directly below is a bin of 208s for about 3$ each.

Holy Jesus that's insane. hahaha

Cozybuilder

Quote from: UnholyRiffs on May 18, 2017, 05:34:46 PM
Quote from: GGBB on May 18, 2017, 03:10:58 PM
There's a local place here in Toronto that has a bin full of 308s for about 12$ each. Directly below is a bin of 208s for about 3$ each.

Holy Jesus that's insane. hahaha

Following this logic, then they will pay you how much to take their 108's?
Some people drink from the fountain of knowledge, others just gargle.

bluebunny

Quote from: Cozybuilder on May 18, 2017, 06:02:53 PM
Following this logic, then they will pay you how much to take their 108's?

Perhaps they'll pay my LHR-YYZ air fare to come and collect a handful.  :D
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Ohm's Law - much like Coles Law, but with less cabbage...

Cozybuilder

Quote from: bluebunny on May 19, 2017, 03:06:47 AM
Quote from: Cozybuilder on May 18, 2017, 06:02:53 PM
Following this logic, then they will pay you how much to take their 108's?

Perhaps they'll pay my LHR-YYZ air fare to come and collect a handful.  :D

I just made that flight 2 weeks ago (audit in Modena, BLQ-LHR-YYZ-BNA). LHR is no longer serving a full English in the lounge- doggone cost cutting measures  >:(
Some people drink from the fountain of knowledge, others just gargle.

duck_arse

Quote from: Cozybuilder on May 19, 2017, 05:25:21 AM
.... LHR is no longer serving a full English in the lounge- doggone cost cutting measures  >:(

what, you getting the steak, but no chips?

[I have no idea what all those capitaL letters are. QF?]
" I will say no more "

thermionix

#53
Quote from: duck_arse on May 19, 2017, 11:03:28 AM
[I have no idea what all those capitaL letters are.]

Airport codes.

bluebunny

Good ol' IATA.  Many moons ago, I worked for an air express carrier.  (Can't say which one, but Donald Duck's nephews were involved...)  We giggled like schoolkids when we "sent" test shipments from Fukuoka, Japan to Oshawa, Canada.   :icon_rolleyes:
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Ohm's Law - much like Coles Law, but with less cabbage...

thermionix


bluebunny

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Ohm's Law - much like Coles Law, but with less cabbage...