D-Lab Basic Training Fender 5F1 Clone kit tube guitar amp noise issues poor build
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- Опубліковано 22 бер 2024
- Yes, Basic training is back. Sorry its been a while since the last. I have been very busy clearing backlog repairs. Have to keep the customers happy. This 5F1 came in with noise/build complaints. The eyelet board was pretty messed up. All solder connections were merely tack soldered on. For instance leads were just laid against tube socket terminals and a drop of solder added. Same with most eyelet terminations. These old amps and other vintage electronics need a mechanical connection, then proper soldering to ensure longevity. Solder is not glue. It appeared that this build was completed quickly. May have just been inexperience, I dont know. The rebuild process took about 4 hours. Now it is a great sounding amp and should provide reliable service. BTW, I believe this is a Mojotone kit.
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Thank you Terry for doing these basic training vids. Good stuff!
Good stuff. Thanks Terry. An additional comment on the apples to oranges comparison of SMD to eyelet or through-hole solder joints - SMDs are part of a purpose-designed system that optimizes the mechanical contact between the SMD pads and the PCB pads. Everything is designed to align and fit with no stress when the solder on the PCB pad is reheated. Not possible with discrete wired components and wires. As you always advise, you gotta maximize that physical connection when soldering them.
Good to see you back with another installment, Terry. Thanks for posting.
Nice work Terry and looks great.
I love these Terry. I might even dig out my uncompleted 5F1 and give it a go!
Looks Great Now!
Well done. Love those F&T caps. Thanks for sharing.
You know what would be a treat? Build the dual rectified Angela Super Single Ended. Say 2 6X4s, a 6EU7 and 2 parallel 6AQ5s (or Bs). Call it the Super Sixes. Maybe add a 6AU6 and have 2 inputs, one in front and one after the 6AU6, 2 volumes one tone.
I think I just talked myself into it lol. Angela has a bunch of great fun circuits.
Nice job T-bone. I also love the sofa techs that always feel the need to weigh in.
Whoever stated that SM components never fail, mechanical connection or not, has obviously never worked on boards with them.
Thanks! Terry 🐭🔊
Great video! Did the amps owner say if the clone ever functioned properly? You mention seeing solder corrosion, so I assume it’s not a fresh build?
the intro... much appreciated 👌
Hi Terry have a ?. Do you need heavier wire for ground off of main board ? Doing an AB 763
👍👍😊😊
First amp I built. It went well with no issues. I think touching up all the solder joints would fix this one.
Could be, but a customers amp has to be reliable
The problem with solder touch up is that all the old solder has to be removed, clean with ISO, and resolder. it's less time and labor to replace the board. New solder to old/cold solder does not fix it.
Just to add, let's say an old Fender has one solder defect. The proper and reliable fix is to suck out all of the old solder, pull the leads out, clean everything with ISO, resolder. (the old resin is oxidized and will hinder new solder flow) The new solder will flow and be smooth and bright, nice fillet on the eyelet and leads.
Nice job.
Nice Job!
Cool!
Solder is not glue! you need a good mechanical connection first, especially with point to point construction.
I have a basic transistor Peavey amplifier, but I have an issue where the low end will intermittently cut out and come back in. I was wondering if you possible know what would cause this? Could it be my apartments power? Or is it something in the amp?
At 2:24 in I'm wondering why not re-flow/refresh the solder joints instead of replacing the board?
Corrosion on eyelets, covered in video
Terry explained that the eyelets are corroded. But that aside, new solder to existing cold, oxidized solder does not fix the problem. The connection will be "improved" but still be cold solder. The old solder has to be removed, all the old flux cleaned with ISO, resolder, and it will flow beautifully with minimal heating.
My first amp build was a 5F1 kit, I ran into problems but got it sorted eventually with help from the Telecaster forum boys. I really like the tag strip mod you do for all the grounds and think I will do that too. Could you tell me where you sourced that eyelet board, I have a second 5F1 chassis that I have been thinking about building for my grandson.