It is currently Mon Mar 16, 2020 4:12 pm

All times are UTC - 7 hours



Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next
Author Message
Post subject: Help Replacing Plastic Input Jacks on Fender Hot Rod Deluxe
Posted: Sun Nov 20, 2016 3:08 pm
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
Hello – I am looking to replace the plastic input jacks on my Fender USA made Hot Rod Deluxe. I bought the amp used and do not know the exact year made, but it came with a 1996 Service Manual. I have seen other posts on this forum that say that Switchcraft metal jacks can be used to replace the Fender stock jacks, but I am not clear as to which parts to buy.

Per the Service Manual, the Fender parts are listed as:

Part # Description Reference Designation
031570 JACK PHONE PCB STEREO PREMIUM J4 POWER AMP IN
037036 JACK PHONE PCB MONO CA PREMIUM J1,2,3,5 INPUTS, PREOUT, FTSW

Can someone knowledgeable please confirm that that following Switchcraft parts can effectively be used to replace the Fender stock parts? If these don’t work, can you please suggest the correct Switchcraft part number?

Per the Switchcraft official website:

Product Description
12B 1/4" Stereo 3 Conductor Jack w/Nut & Washer, Double Open Circuit
11 1/4" Mono 2 Conductor Jack w/Nut & Washer, Open Circuit

Thanks!


Top
Profile
Fender Play Winter Sale 2020
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Mon Nov 21, 2016 6:14 pm
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
You need the switchcraft no 12A.
1/4" Mono 2 Conductor Jack w/Nut & Washer, Tip is Shunt.

You must know how to solder properly and solder the right wire at the right place


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Tue Nov 22, 2016 6:30 am
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
stratele52 wrote:
You need the switchcraft no 12A.
1/4" Mono 2 Conductor Jack w/Nut & Washer, Tip is Shunt.


That's great. Thanks!

For the fourth jack "Power Amp In", the Service Manual describes the part as JACK PHONE PCB STEREO PREMIUM. Would this jack use Switchcraft Part 13B 1/4" Stereo 3 Conductor Jack w/Nut & Washer, Tip is Shunt?


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Tue Nov 22, 2016 6:43 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
Little Jerry wrote:
stratele52 wrote:
You need the switchcraft no 12A.
1/4" Mono 2 Conductor Jack w/Nut & Washer, Tip is Shunt.


That's great. Thanks!

For the fourth jack "Power Amp In", the Service Manual describes the part as JACK PHONE PCB STEREO PREMIUM. Would this jack use Switchcraft Part 13B 1/4" Stereo 3 Conductor Jack w/Nut & Washer, Tip is Shunt?


No. It is not.

I won't replace this jack if you are not qualified. Too many wires and contacts. A mistake and amp will not work.


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Tue Nov 22, 2016 7:12 am
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
[/quote]
No. It is not.

I won't replace this jack if you are not qualified. Too many wires and contacts. A mistake and amp will not work.[/quote]

The jacks are going to be professionally installed by a qualified amp service technician. I am having the speaker replaced, so I thought I would have the jacks upgraded at the same time. As it stands, I am waiting for the speaker to arrive, so I would prefer to buy the jacks myself so that I don't have to wait additional time for the tech to order the parts. If #13B is the incorrect part, can you please suggest the correct replacement Switchcraft part number for the fourth jack? Thanks!


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Tue Nov 22, 2016 10:52 am
Offline
Professional Musician
Professional Musician

Joined: Thu Aug 07, 2014 3:25 pm
Posts: 1023
While the Switchcraft jacks are mechanically stronger,than the stock plastic ones, the failed jacks in question have managed to last 20 years.
I replace hrdx jacks with original plastic so I don't get ground loop noise on the input.
The switchcraft jacks have a threaded metal sleeve that connects to chassis ground. Two adjacent grounds can pick up hum induced into the chassis by internal or external fields.
The plastic jacks have an isolated ground running to the circuit board with no local chassis ground.
This extra ground connection can be avoided with insulating washers, but then we're back to an unstable mounting situation.
The main problem is that the jacks are only held by the soldering in the rear. So levering the input plug pulls the solder connections right out of the board. Once it gets a little loose, the nuts come loose and start to strip out until you can't tighten it up anymore.
That's when its time to replace the jack. If the threads are OK, you can probably just resolder the old ones.
So I still use the originals and get a reasonable lifespan out of them.
I also put hot melt glue between and around them to beef up the mounting in the rear. So far there's no problem with it melting out again.
While you are resoldering the jacks, you will also see a lot of other solder that needs to be touched up..


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Tue Nov 22, 2016 2:53 pm
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
TimsAudio wrote:
While the Switchcraft jacks are mechanically stronger,than the stock plastic ones, the failed jacks in question have managed to last 20 years.
I replace hrdx jacks with original plastic so I don't get ground loop noise on the input.
The switchcraft jacks have a threaded metal sleeve that connects to chassis ground. Two adjacent grounds can pick up hum induced into the chassis by internal or external fields.
The plastic jacks have an isolated ground running to the circuit board with no local chassis ground.
This extra ground connection can be avoided with insulating washers, but then we're back to an unstable mounting situation.
The main problem is that the jacks are only held by the soldering in the rear. So levering the input plug pulls the solder connections right out of the board. Once it gets a little loose, the nuts come loose and start to strip out until you can't tighten it up anymore.
That's when its time to replace the jack. If the threads are OK, you can probably just resolder the old ones.
So I still use the originals and get a reasonable lifespan out of them.
I also put hot melt glue between and around them to beef up the mounting in the rear. So far there's no problem with it melting out again.
While you are resoldering the jacks, you will also see a lot of other solder that needs to be touched up..



Sounds like good advice. Looks like someone replaced a few of the jacks on the amp with what looks like open frame Switchcraft jacks, but I don't know which ones. Since the other jacks are stable for now, I guess why fix what's not broken? I was just thinking that since the amp is going to get pulled apart for the speaker install, why not replace the remaining plastic jacks with metal ones. Thanks for your input!


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 2:18 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
Image

The input jacks are L12A, and use fiber shoulder washers to keep the jack from contacting the frame. Fiber shoulder washer on one side, fiber flat washer on the other side. Nothing unstable about using shoulder washers, they provide a very secure mount. (this is a picture of my amp)

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 3:13 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Fri Feb 05, 2010 4:31 am
Posts: 14049
Location: Province de Québec, Canada
shimmilou wrote:


The input jacks are L12A, and use fiber shoulder washers to keep the jack from contacting the frame. Fiber shoulder washer on one side, fiber flat washer on the other side. Nothing unstable about using shoulder washers, they provide a very secure mount. (this is a picture of my amp)


To you need to make a bigger holes in the amp front plate ?


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 5:54 am
Offline
Rock Icon
Rock Icon
User avatar

Joined: Tue Jun 29, 2010 1:20 pm
Posts: 9640
Location: Indiana
No

http://www.newark.com/switchcraft/l-12a/connector-phone-audio-jack-4-position/dp/39F654?ost=L12A&categoryIdBox=&selectedCategoryId=&searchView=table&iscrfnonsku=false

http://www.mouser.com/ProductDetail/Keystone-Electronics/3069/?qs=l8Mz4RVwyflRu0gEeXTRvw%3d%3d

http://www.mouser.com/ProductDetail/Keystone-Electronics/3222/?qs=zfzUrXoPZmiqhiSt05vgkw%3d%3d

_________________
---> "The amp should be SWITCHED OFF AND UNPLUGGED before you do this!" <---

Por favor, disculpe mi español, no se llega a la práctica con mucha frecuencia.


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 9:01 am
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
shimmilou wrote:
The input jacks are L12A, and use fiber shoulder washers to keep the jack from contacting the frame. Fiber shoulder washer on one side, fiber flat washer on the other side. Nothing unstable about using shoulder washers, they provide a very secure mount. (this is a picture of my amp)


Thanks for the pictures and links to the recommended parts. I do have one question though. The schematic and parts list that came with the Fender Service Manual shows that the fourth jack, called "Power Amp In" and described as "Jack Phone PCB Stereo Premium" is different than the other four input jacks that are described as mono jacks. Would you use the Switchcraft 12A jack for the "Power Amp In" as well? It seems to me that the Switchcraft jack #13B is the stereo version of #12A. From a practical sense, it may not matter, but I am curios since Fender listed this input jack differently from all the rest.


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 4:08 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
It's a stereo jack. Requires more connections. Does it look like this?

http://www.tubeampdoctor.com/product_in ... 2nq43J2IQ1

Or this?

http://www.tubeampdoctor.com/en/shop_Ca ... mount_4592


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 4:50 pm
Offline
Hobbyist
Hobbyist

Joined: Wed Apr 27, 2016 11:05 am
Posts: 14
BMW2002Ti wrote:
It's a stereo jack. Requires more connections. Does it look like this?

http://www.tubeampdoctor.com/product_in ... 2nq43J2IQ1

Or this?

http://www.tubeampdoctor.com/en/shop_Ca ... mount_4592


It looks like the jack on the second link. The part is described as follows on a website listing Fender replacement parts: "Fender® PCB mount 1/4" jack. Stereo, 9 pin. Used as the Power Amp In jack only on the original 1990s Hot Rod Deluxe. Fender® part number 0990913000 and 031570."


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 5:02 pm
Offline
Rock Star
Rock Star
User avatar

Joined: Sat Jul 03, 2010 2:18 pm
Posts: 6544
Yeah, it seems the "stereo" option is main difference. I guess to plug in a stereo source to the amp? Does really make sense, because output of your amp is not stereo. Right?

But, better stick to OEM, as much as possible.


Top
Profile
Post subject: Re: Help Replacing Plastic Input Jacks on Fender Hot Rod Del
Posted: Wed Nov 23, 2016 9:08 pm
Offline
Professional Musician
Professional Musician

Joined: Thu Aug 07, 2014 3:25 pm
Posts: 1023
The stereo jack also carries switching contacts for the involved circuitry. There are NO and NC contacts for ring and tip.
You won t find open frame jacks with that complex of a switch.

Shimmilou, I'm sure you know how to keep your jacks tight. I just didn't think it was the best idea for the average musician.


Top
Profile
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Go to page 1, 2  Next

All times are UTC - 7 hours

Fender Play Winter Sale 2020

Who is online

Users browsing this forum: No registered users and 2 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

Search for:
Jump to: