Gibbs reverb pan just installed...

Badger

Joined: Nov 16, 2013
Posts: 4536
Wisconsin
United States

Posted on Dec 01 2015 06:46 AM

This might be of help to some, as well as feed the search engine for those who come later. Note that 'impedance' ratings (ala the common number codes) are not the DC resistance you'll get checking with a simple meter; important to know what one is checking for.

—

Wes
SoCal ex-pat with a snow shovel

DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices.

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DannySnyder

Joined: Mar 02, 2006
Posts: 11046
Berkeley, CA
United States

Posted on Dec 01 2015 09:33 AM

Oops, I should have said resistance. Typically you want approx 1-2Ω on the input and 170Ω on the output

—

Danny Snyder

"With great reverb comes great responsibility" - Uncle Leo

Playing keys and guitar with Combo Tezeta

Formerly a guitarist in The TomorrowMen and Meshugga Beach Party

Latest surf project - Now That's What I Call SURF

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LaFleur

Joined: May 20, 2009
Posts: 525
Leipzig
Germany

Posted on Mar 08 2016 06:27 AM

The A023580-15 is also stamped R inside.

—

http://www.reverbnation.com/bangmustang
http://www.facebook.com/bangmustang
https://soundcloud.com/bang-mustang

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LaFleur

Joined: May 20, 2009
Posts: 525
Leipzig
Germany

Posted on Mar 12 2016 03:34 AM

AO23580-18 is stamped 4V inside. Don't know the resistance yet.

—

http://www.reverbnation.com/bangmustang
http://www.facebook.com/bangmustang
https://soundcloud.com/bang-mustang

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RobinsonCrusoe

Joined: Aug 08, 2009
Posts: 49
Saarbruecken Germany
1 Calendar Pin

Posted on Mar 13 2016 11:01 AM

My AO-23580-17 4U measured 1.7Ω (white transducer)
and 200Ω (red transducer).Grounded on the output side.

Last edited: Mar 13, 2016 13:03:39

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choice_of_meat

Joined: Oct 04, 2013
Posts: 42

Posted on May 01 2017 01:52 PM

Anecdote, I just bought a Gibbs L pan off ebay, like the OP from years ago I also have to turn up things, and it sounds amazing. I did have to spray it with contact cleaner and get the RCA jacks to make full contact.

INPUT RESISTANCE IS 170 OHM. OUTPUT RESISTANCE IS 177 OHMS according to the seller (not sure how that makes sense, but whatever.

Now its Drip, perfect decay and no annoying overly metallic overtones...

I think the springs and the quality of steel probably have to do with the sound, like how vintage transformers sound "better" or whatnot I guess. I debated just swapping the springs into one of my modern pans, but decided that was too much of a hassle.

Last edited: May 01, 2017 13:54:48

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kick_the_reverb

Joined: Feb 26, 2006
Posts: 1335
Escondido, CA
2 News Pins

Posted on May 01 2017 09:43 PM

Sorry, but you bought a pan that's not really compatible with a Fender reverb unit. One post above you shows the colors/ranges you should look for. I believe yours is Red/Red. Yes, your pan does work, but it's not optimized, that's why you need turn things up. I believe you will be much happier with a proper pan.
If you don't play in a band, it might not be as critical, but in a band situation, it will make a difference.
Good luck,
Ran

—

The Scimitars

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choice_of_meat

Joined: Oct 04, 2013
Posts: 42

Posted on May 04 2017 07:31 PM

Duh! Thanks your right. I had to re-read this thread a few times to really get it. I thought the colors were for the rca jack inputs.. mine are white and red, but the transducer things are red/red and I completely ignored the specs the seller posted. Id10T error!

I like the sound though as I mentioned above. I might try migrating the springs, or I'll just sell it and move along (was only $20).

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kick_the_reverb

Joined: Feb 26, 2006
Posts: 1335
Escondido, CA
2 News Pins

Posted on May 04 2017 10:56 PM

Yeah, they are not expensive, just be on the lookout, the right ones come up every 1-3 months.
All the best,
Ran

—

The Scimitars

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LaFleur

Joined: May 20, 2009
Posts: 525
Leipzig
Germany

Posted on Oct 23 2017 01:10 AM

AO-23580-18 is stamped 4V in the inside. It has 180 ohms on the Input and 180ohms on the output.

—

http://www.reverbnation.com/bangmustang
http://www.facebook.com/bangmustang
https://soundcloud.com/bang-mustang

Top

DannySnyder

Joined: Mar 02, 2006
Posts: 11046
Berkeley, CA
United States

Posted on Oct 23 2017 01:14 AM

LaFleur wrote:

AO-23580-18 is stamped 4V in the inside. It has 180 ohms on the Input and 180ohms on the output.

I've found that won't work. The input should be between 1 and 2 ohms.

—

Danny Snyder

"With great reverb comes great responsibility" - Uncle Leo

Playing keys and guitar with Combo Tezeta

Formerly a guitarist in The TomorrowMen and Meshugga Beach Party

Latest surf project - Now That's What I Call SURF

Top

LaFleur

Joined: May 20, 2009
Posts: 525
Leipzig
Germany

Posted on Oct 23 2017 04:52 AM

I know Danny. I just want to create a kinda database, where people can inform themself, if they find a pan on ebay.

—

http://www.reverbnation.com/bangmustang
http://www.facebook.com/bangmustang
https://soundcloud.com/bang-mustang

Top

bolero

Joined: Sep 02, 2018
Posts: 1

Posted on Sep 02 2018 10:29 PM

thanks for doing that, everyone!

I have a salvaged Gibbs/Hammond with the following codes:

A023580-15
1122 - 6347
R stamped inside

thanks to this site, I now know:
1122 = mfr code
6347 = 47th week of 1963

I can't tell if the tape is yellow, or just old faded white?

output measures approx 175 ohm resistance, could not get a reading on the input, but I'm an electrical noob

LaFleur, what tank are you using your A023580-15 in? if it is working for you, I can figure out what amp/circuit to use mine in.

I wonder what the "R" stands for? mine was out of an old abandoned organ

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doctorock78

Joined: Aug 08, 2018
Posts: 42
Honolulu, HI
United States

Posted on Sep 03 2018 03:55 AM

Guys and gals this is amazing info thanks a million! I am on the hunt for a Gibbs pan to put in my G-Spring.... Time to dust off the multimeter

—

Robbin Henley (Men in Grey Suits HONOLULU)

https://www.facebook.com/Men-In-Grey-Suits-207897529235582/

www.meningreysuits.com

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doctorock78

Joined: Aug 08, 2018
Posts: 42
Honolulu, HI
United States

Posted on Sep 03 2018 05:06 PM

So if the input is 180 Ohm and it still sounds good (albeit higher settings on the control pots), is it usable or will it stress components in the tube circuit / transformers etc.?

—

Robbin Henley (Men in Grey Suits HONOLULU)

https://www.facebook.com/Men-In-Grey-Suits-207897529235582/

www.meningreysuits.com

Top

Badger Joined: Nov 16, 2013 Posts: 4536 Wisconsin	Posted on Dec 01 2015 06:46 AM This might be of help to some, as well as feed the search engine for those who come later. Note that 'impedance' ratings (ala the common number codes) are not the *DC resistance* you'll get checking with a simple meter; important to know what one is checking for. — Wes SoCal ex-pat with a snow shovel DISCLAIMER: The above is opinion/suggestion only & should not be used for mission planning/navigation, tweaking of instruments, beverage selection, or wardrobe choices. Top
DannySnyder Joined: Mar 02, 2006 Posts: 11046 Berkeley, CA	Posted on Dec 01 2015 09:33 AM Oops, I should have said resistance. Typically you want approx 1-2Ω on the input and 170Ω on the output — Danny Snyder "With great reverb comes great responsibility" - Uncle Leo Playing keys and guitar with Combo Tezeta Formerly a guitarist in The TomorrowMen and Meshugga Beach Party Latest surf project - Now That's What I Call SURF Top
LaFleur Joined: May 20, 2009 Posts: 525 Leipzig	Posted on Mar 08 2016 06:27 AM The A023580-15 is also stamped R inside. — http://www.reverbnation.com/bangmustang http://www.facebook.com/bangmustang https://soundcloud.com/bang-mustang Top
LaFleur Joined: May 20, 2009 Posts: 525 Leipzig	Posted on Mar 12 2016 03:34 AM AO23580-18 is stamped 4V inside. Don't know the resistance yet. — http://www.reverbnation.com/bangmustang http://www.facebook.com/bangmustang https://soundcloud.com/bang-mustang Top
RobinsonCrusoe Joined: Aug 08, 2009 Posts: 49 Saarbruecken Germany	Posted on Mar 13 2016 11:01 AM My AO-23580-17 4U measured 1.7Ω (white transducer) and 200Ω (red transducer).Grounded on the output side. Last edited: Mar 13, 2016 13:03:39 Top
choice_of_meat Joined: Oct 04, 2013 Posts: 42	Posted on May 01 2017 01:52 PM Anecdote, I just bought a Gibbs L pan off ebay, like the OP from years ago I also have to turn up things, and it sounds amazing. I did have to spray it with contact cleaner and get the RCA jacks to make full contact. INPUT RESISTANCE IS 170 OHM. OUTPUT RESISTANCE IS 177 OHMS according to the seller (not sure how that makes sense, but whatever. Now its Drip, perfect decay and no annoying overly metallic overtones... I think the springs and the quality of steel probably have to do with the sound, like how vintage transformers sound "better" or whatnot I guess. I debated just swapping the springs into one of my modern pans, but decided that was too much of a hassle. Last edited: May 01, 2017 13:54:48 Top
kick_the_reverb Joined: Feb 26, 2006 Posts: 1335 Escondido, CA	Posted on May 01 2017 09:43 PM Sorry, but you bought a pan that's not really compatible with a Fender reverb unit. One post above you shows the colors/ranges you should look for. I believe yours is Red/Red. Yes, your pan does work, but it's not optimized, that's why you need turn things up. I believe you will be much happier with a proper pan. If you don't play in a band, it might not be as critical, but in a band situation, it will make a difference. Good luck, Ran — The Scimitars Top
choice_of_meat Joined: Oct 04, 2013 Posts: 42	Posted on May 04 2017 07:31 PM Duh! Thanks your right. I had to re-read this thread a few times to really get it. I thought the colors were for the rca jack inputs.. mine are white and red, but the transducer things are red/red and I completely ignored the specs the seller posted. Id10T error! I like the sound though as I mentioned above. I might try migrating the springs, or I'll just sell it and move along (was only $20). Top
kick_the_reverb Joined: Feb 26, 2006 Posts: 1335 Escondido, CA	Posted on May 04 2017 10:56 PM Yeah, they are not expensive, just be on the lookout, the right ones come up every 1-3 months. All the best, Ran — The Scimitars Top
LaFleur Joined: May 20, 2009 Posts: 525 Leipzig	Posted on Oct 23 2017 01:10 AM AO-23580-18 is stamped 4V in the inside. It has 180 ohms on the Input and 180ohms on the output. — http://www.reverbnation.com/bangmustang http://www.facebook.com/bangmustang https://soundcloud.com/bang-mustang Top
DannySnyder Joined: Mar 02, 2006 Posts: 11046 Berkeley, CA	Posted on Oct 23 2017 01:14 AM LaFleur wrote: AO-23580-18 is stamped 4V in the inside. It has 180 ohms on the Input and 180ohms on the output. I've found that won't work. The input should be between 1 and 2 ohms. — Danny Snyder "With great reverb comes great responsibility" - Uncle Leo Playing keys and guitar with Combo Tezeta Formerly a guitarist in The TomorrowMen and Meshugga Beach Party Latest surf project - Now That's What I Call SURF Top
LaFleur Joined: May 20, 2009 Posts: 525 Leipzig	Posted on Oct 23 2017 04:52 AM I know Danny. I just want to create a kinda database, where people can inform themself, if they find a pan on ebay. — http://www.reverbnation.com/bangmustang http://www.facebook.com/bangmustang https://soundcloud.com/bang-mustang Top
bolero Joined: Sep 02, 2018 Posts: 1	Posted on Sep 02 2018 10:29 PM thanks for doing that, everyone! I have a salvaged Gibbs/Hammond with the following codes: A023580-15 1122 - 6347 R stamped inside thanks to this site, I now know: 1122 = mfr code 6347 = 47th week of 1963 I can't tell if the tape is yellow, or just old faded white? output measures approx 175 ohm resistance, could not get a reading on the input, but I'm an electrical noob LaFleur, what tank are you using your A023580-15 in? if it is working for you, I can figure out what amp/circuit to use mine in. I wonder what the "R" stands for? mine was out of an old abandoned organ Top
doctorock78 Joined: Aug 08, 2018 Posts: 42 Honolulu, HI	Posted on Sep 03 2018 03:55 AM Guys and gals this is amazing info thanks a million! I am on the hunt for a Gibbs pan to put in my G-Spring.... Time to dust off the multimeter — Robbin Henley (Men in Grey Suits HONOLULU) https://www.facebook.com/Men-In-Grey-Suits-207897529235582/ www.meningreysuits.com Top
doctorock78 Joined: Aug 08, 2018 Posts: 42 Honolulu, HI	Posted on Sep 03 2018 05:06 PM So if the input is 180 Ohm and it still sounds good (albeit higher settings on the control pots), is it usable or will it stress components in the tube circuit / transformers etc.? — Robbin Henley (Men in Grey Suits HONOLULU) https://www.facebook.com/Men-In-Grey-Suits-207897529235582/ www.meningreysuits.com Top

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Gibbs reverb pan just installed...