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Post subject: Fender Pro Jr. Transplant Problem
Posted: Wed Feb 08, 2017 2:54 pm
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I bought this amp from Armored Amplification on Reverb. It is a Fender Pro Jr. chassis stuck inside a vintage Knox lunchbox amp from the 60s. I am having a few problems. First off, it hums if you turn the volume up just a bit. The hum grows louder the more you turn the knob. There is also an odor when the amp has been running for a time. It smells like something is burning. Could this be a resistor or is the amplifier arcing? I heard installing shorting jacks might help. When it came in the mail the PT was stuck to the back of the speaker magnet. It looks like they made a poor attempt at trying to mount it and it broke. The OT is on stilts and just wobbles. At least they made the wiring look tidy. Any help would be appreciated.

https://www.flickr.com/photos/thecleane ... ed-public/


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 09, 2017 2:26 am
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Location: Province de Québec, Canada
Easier for us if you post photo on the forum;

This amp is a real mess. Most all wire are poor and act like antenna to produce, hum ,noise.
Job is so poor you may have always lots of problems.

Wires to both pots need a shield to ground at least. Same for the two input jacks.
Input jacks must be a shorting type as you write
Unless you are skill in electronic and in amp wiring, I return it back to the seller and ask a refund.





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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 09, 2017 2:39 am
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stratele52 wrote:
Image


Good Gawd......what the hell was the point of all those "improvements"?

:shock:

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 09, 2017 3:03 am
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$200 , non comments..... :(

http://armoredamps.com/1961-knox-cab-w- ... o-jr-guts/

Look a nobody who sell amp, not a serious store.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 09, 2017 9:10 pm
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Amplifiers need to be in a shielded box to prevent hum.
This was assembled by an idiot.
Find a metal enclosure to shield the circuit board inside.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 09, 2017 10:07 pm
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I found out if you turn the volume up only a little bit so the hum is quiet and turn the tone knob up it will give the amp more of a kick and you can't hear all the problems. That's probably what they did in the video so the unsuspecting customer (me) wouldn't know what a poor job they did. On top of that the Reverb listing had a picture of a different cabinet and there wasn't a stain on the grill cloth! They didn't put any packing inside the amp like they didn't give a crap and one of the tubes was broken. Kind of disrespectful. I had some Russian guys on Reverb try and swindle me out of a $500 guitar and I always report stuff like this. Luckily, I bought this for less than $200 and a used Pro Jr. is out of my price range right now. I have this old Magnavox chassis I'm stripping and I could probably use it as a box. Don't wanna use my 5f1 Champ box because that would cost another $50.

https://www.flickr.com/photos/thecleane ... ed-public/


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Fri Feb 10, 2017 2:53 am
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This amp was a easy to fix by a qualified tech, but it may need another cabinet.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Fri Feb 10, 2017 4:15 pm
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Why a new cabinet?


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Sat Feb 11, 2017 3:15 am
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adformento wrote:
Why a new cabinet?


I write "it may" , not sure. I see there are no room to safely mount Power Transformer and Output transformer.
Both transformers must be mount far apart to be quiet.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Wed Feb 15, 2017 5:35 am
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I'm honestly astonished we are being put on blast for this, especially with out even a courtesy email. Thank you to the individual who let me know this was going on.
I would like to begin by saying this was NEVER sold as some completed transplant and I posted pictures to make sure it was known. This was straight junk that was sitting around the shop when I had it cleaned out. I honestly sold this for the circuit and transformers only for $190 shipped. I just didn't want to throw it away because I assumed someone would need the circuit for their Pro Jr. I would have pulled it from the old cab but I figured this proved the circuit worked at least. The circuit board and transformers are all in working condition, and the only reason we had them is because the customer wanted it hand wired and we had the board left after. I'm not going to come bash anyone here, just want the entire story to be displayed. We have tons of amps sold on Reverb and we have went to great lengths to ensure customer satisfaction. To include ordering full new sets of tubes for customers, paying their local tech to make repairs from shipping damage, refunding and allowing customer to keep product because we were unclear or made a mistake on posting.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Wed Feb 15, 2017 9:16 am
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I'm honestly astonished we are being put on blast for this, especially with out even a courtesy email. Thank you to the individual who let me know this was going on.
I would like to begin by saying this was NEVER sold as some completed transplant and I posted pictures to make sure it was known. This was straight junk that was sitting around the shop when I had it cleaned out. I honestly sold this for the circuit and transformers only for $190 shipped. I just didn't want to throw it away because I assumed someone would need the circuit for their Pro Jr. I would have pulled it from the old cab but I figured this proved the circuit worked at least. The circuit board and transformers are all in working condition, and the only reason we had them is because the customer wanted it hand wired and we had the board left after. I'm not going to come bash anyone here, just want the entire story to be displayed. We have tons of amps sold on Reverb and we have went to great lengths to ensure customer satisfaction. To include ordering full new sets of tubes for customers, paying their local tech to make repairs from shipping damage, refunding and allowing customer to keep product because we were unclear or made a mistake on posting.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Wed Feb 15, 2017 8:02 pm
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I'm honestly astonished we are being put on blast for this, especially with out even a courtesy email. Thank you to the individual who let me know this was going on.
I would like to begin by saying this was NEVER sold as some completed transplant and I posted pictures to make sure it was known. This was straight junk that was sitting around the shop when I had it cleaned out. I honestly sold this for the circuit and transformers only for $190 shipped. I just didn't want to throw it away because I assumed someone would need the circuit for their Pro Jr. I would have pulled it from the old cab but I figured this proved the circuit worked at least. The circuit board and transformers are all in working condition, and the only reason we had them is because the customer wanted it hand wired and we had the board left after. I'm not going to come bash anyone here, just want the entire story to be displayed. We have tons of amps sold on Reverb and we have went to great lengths to ensure customer satisfaction. To include ordering full new sets of tubes for customers, paying their local tech to make repairs from shipping damage, refunding and allowing customer to keep product because we were unclear or made a mistake on posting.


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Wed Feb 15, 2017 9:59 pm
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And you felt compelled to post THREE identical mea culpas because......?

:roll:

Arjay

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"Here's why reliability is job one: A great sounding amp that breaks down goes from being a favorite piece of gear to a useless piece of crap in less time than it takes to read this sentence." -- BRUCE ZINKY


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 16, 2017 3:10 am
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AAmps, your add say it sound phenomenal
:lol:

"For sale is a really cool 1961 Know 1x8 combo that was originally a Widow Maker circuit. I had a circuit and transformers from a Fender Pro Jr, which I transplanted in the Knox. Nothing special, and kind of thrown together out of boredom, but it sound phenomenal and looks even better! "


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Post subject: Re: Fender Pro Jr. Transplant Problem
Posted: Thu Feb 16, 2017 10:13 am
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AAmps, Welcome to the forum.Sorry it was a rocky introduction.
This is a lesson in putting your name on a substandard product.
You have a nice web site and seem experienced. If you have problems with an oddball amp, be an adult and just disclose it before the sale..
I am constantly dealing with shipped old amps that have undisclosed problems. The tussle as to who is responsible is not a good way to do business. And some of the problems are unrepairable. Wether the problem was known by the seller is irrevelant. Renegotiating the selling price rather than guaranteeing a repair on one end or the other is a more sensible approach. Better yet, disclose known problems. Customers will compensate their expectations.
But when your site advertises,"Think of this as Craigslist, except we got all the good stuff and none of the junk!" You are raising expectations and then selling an admittedly poorly designed amp with your name on it.
If you want to build your reputation, standing behind only well-designed products is the way to move forward.
See you on the forums


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