1969 Les Paul Professional Patch Cord Needed

[pgodman]

Hi everyone, I have a 1969 LP Professional but dont have low impedance transformer cord.   Does anyone know where I can get one?   Love to get an original.   I have emailed Gibson, but no reply.

thks 

[Grog]

You can buy a Sure A95U at many retailers. It is the closest transformer available to the original.  Keeping the transformer close to the amp gives you the best results.

https://www.americanmusical.com/Item--i-SHU-A95U?src=Y0802G00SRCHCAPN&adpos=1o5&scid=scplpSHU+A95U&sc_intid=SHU+A95U&gclid=Cj0KCQjws7TqBRDgARIsAAHLHP7uL3x5laFbdaIpPs8OfoHkQtZZ3WjyrT3dZFrCMMG6TEfrnThYQKAaAgdnEALw_wcB

I watched eBay for many years to find an original, they are rarer than Hen's Teeth!

[pgodman]

Thank you !!!

[Big Bill]

4 hours ago, Grog said:

I watched eBay for many years to find an original, they are rarer than Hen's Teeth!

I just happen to have a set of hen's teeth for sale at this moment!

[Grog]

Just a side note, you will need an "unbalanced" cable to go with it. I found this one at Sweetwater, but it is only 5 foot long. Mine is a Hosa cable also but longer.

https://www.sweetwater.com/store/detail/PXF105--hosa-pxf105-5-foot?mrkgcl=28&mrkgadid=3308752981&rkg_id=0&product_id=PXF105&campaigntype=shopping&campaign=aaShopping+-+SKU+-+Accessories&adgroup=Cables+-+Hosa+-+pxf105&placement=google&adpos=1o5&creative=290335234793&device=c&matchtype=&network=g&gclid=Cj0KCQjws7TqBRDgARIsAAHLHP6s88rgwsAOrhnbg9j7HsRUizwe1Ez1OgU_HrkZIeaxSrMGrro9oU0aAjqeEALw_wcB

[pgodman]

thks 

 

[325Jon]

Hi gang, I have a Les Paul Professional that had some modifications done to the electronics before I bought it, and I've been musing over the optimal way to plug it into an amp. I had no idea about the transformer cord being needed, and the guitar usually sounded a bit lackluster, but sometimes sounded AMAZING. I believe I have determined that it sounds amazing when using a nice, short guitar cord, and lackluster when using a longer cord.

The electronic mods are as such: The decade knob has been removed from the circuit and one of the tone knobs also doesn't do anything. There is "something" under the hood that looks like a transformer, which suggests to me that somebody could have modded this guitar to behave like a later Les Paul Recording, which had an internal transformer and was thus able to use a normal guitar cable with it. It appears to have been re-wired by somebody who doesn't use a soldering iron for a living, leading to all manner of speculation over why it intermittently sounds good/bad.

I am thrilled to have discovered that it sounds good with a short guitar cord plugged into it. Jazzy, spacious, neat... But I also have to wonder whether I'm doing things right. Do you think it's worth ordering an A95U? What kind of signal should I be expecting just plugging the guitar into an amp the regular way if the guitar weren't modified? After all, I'm getting a pleasing sound without the A95U -- how unusual is that?

[Grog]

My Les Paul Professional had a large mic-style inline transformer soldered in when I bought it. It was easy to remove it & reconnect the jack wire in my case. On the website that Gibson lists their schematics I found this print that was modified in 1975 to include a transformer like a Les Paul Recording. I think it was fairly common for people to add a transformer to these to avoid the hassle of the chord with an inline transformer. They may have shipped the last of these with this modification.

 http://archive.gibson.com/Files/schematics/LPPro.PDF

A few of us were pretty active in a "Low Impedance Club" thread in the "Vintage Corner" a few years back

https://forum.gibson.com/topic/99362-gibson-low-impedance-guitars-club/

You might find some good info here.....

 

[325Jon]

22 hours ago, Grog said:

My Les Paul Professional had a large mic-style inline transformer soldered in when I bought it. It was easy to remove it & reconnect the jack wire in my case. On the website that Gibson lists their schematics I found this print that was modified in 1975 to include a transformer like a Les Paul Recording. I think it was fairly common for people to add a transformer to these to avoid the hassle of the chord with an inline transformer. They may have shipped the last of these with this modification.

 http://archive.gibson.com/Files/schematics/LPPro.PDF

A few of us were pretty active in a "Low Impedance Club" thread in the "Vintage Corner" a few years back

https://forum.gibson.com/topic/99362-gibson-low-impedance-guitars-club/

You might find some good info here.....

 

Thank you! I plan to join the low impedance guitars club soon!

Regards,

Jon