Search found 17 matches

by mwelch55
Wed Feb 08, 2023 6:35 pm
Forum: Garage Talk
Topic: Tube Headphone Amp Kit
Replies: 5
Views: 1243

Re: Tube Headphone Amp Kit

uses a single 12 V AC input battery?
by mwelch55
Wed Feb 02, 2022 7:22 pm
Forum: Technical Discussion
Topic: Correct Size Knock Out Hole Punches
Replies: 13
Views: 1101

Re: Correct Size Knock Out Hole Punches

I tried hole saws and did not like using them. You have to deal with the pilot bits breaking and it is difficult to extract the metal from inside the hole saw. Also, in my opinion, hole saws are too dangerous. A friend loaned me his Greenlee knockout punches and they were good, but I decided I like ...
by mwelch55
Sun Dec 19, 2021 3:17 pm
Forum: Garage Talk
Topic: No More Tubes Made in China
Replies: 18
Views: 2543

Re: No More Tubes Made in China

I am sad that I wont be able to get the Chinese 6V6s. I could get a matched set for less than 30 dollars US. They sound great, but I guess I won't be getting any more.

Mike
by mwelch55
Sun Dec 12, 2021 2:02 am
Forum: Technical Discussion
Topic: Tube Chassis Layout
Replies: 54
Views: 2607

Re: Tube Chassis Layout

I have used Ceriatone Layouts as a guide to build some of my amps. They have pictorial layouts for most of their amps. I have always had good results following their layouts. Mike as an FYI many of the ceriatone amps were directly cribbed from the amps here :D. I.e. you're saying their layouts look...
by mwelch55
Thu Dec 09, 2021 2:58 pm
Forum: Technical Discussion
Topic: Tube Chassis Layout
Replies: 54
Views: 2607

Re: Tube Chassis Layout

I have used Ceriatone Layouts as a guide to build some of my amps. They have pictorial layouts for most of their amps. I have always had good results following their layouts.

Mike
by mwelch55
Fri Apr 19, 2019 2:54 pm
Forum: Trainwreck Discussion
Topic: 6v6 Wreck Build...Finished w/ clip
Replies: 13
Views: 5635

Re: 6v6 Wreck layout...eyes needed

I have used this transformer from Antique Electronics for two 20 watt builds. Output Transformer primary impedance is 6.6K and has 8 and 16 ohm taps. Primary impedance is the same as a trainwreck transformer. Both of the amps built with this transformer have high gain Marshall preamps and sound incr...
by mwelch55
Fri Oct 12, 2018 2:29 pm
Forum: Trainwreck Discussion
Topic: rate my work please
Replies: 19
Views: 2325

Re: rate my work please

I also see the missing grommet. Are there other missing grommets under the PS Board?

It looks great.
by mwelch55
Fri Oct 05, 2018 2:00 pm
Forum: Technical Discussion
Topic: Heaters not twisted on Brand name amp!
Replies: 17
Views: 1336

Re: Heaters not twisted on Brand name amp!

I don't twist my heater wires and I have built two identical high gain marshall style amps that are very quiet.
by mwelch55
Wed Jul 18, 2018 2:29 pm
Forum: Technical Discussion
Topic: Soldering Tips and Technics by Dr Z
Replies: 6
Views: 1809

Re: Soldering Tips and Technics by Dr Z

I liked the video and took some notes: • Use NASA grade solder such as Kester .031” • Avoid cold solder joints • Use good solder station. Get one that is temperature controlled such as Weller WES51 • Change the soldering iron tip every 40 to 80 hours of use. • Strip, twist, and tin wire. When tinnin...
by mwelch55
Tue Jul 17, 2018 5:53 pm
Forum: Technical Discussion
Topic: Tube amp grounding article/info/links
Replies: 23
Views: 79135

Re: Tube amp grounding article/info/links

I have read multiple times on this forum and other forums that the preamp should be grounded at the input jack. Does that mean that the preamp ground is through the mechanical connection of the input jack? To make a good ground, you would have to tighten the jack pretty tight to get a good enough co...
by mwelch55
Wed Jun 20, 2018 7:01 pm
Forum: Garage Talk
Topic: Do not order from Wattstubeaudio
Replies: 82
Views: 14982

Re: Do not order from Wattstubeaudio

Hi Mike I stock this chassis on this page http://hoffmanamps.com/MyStore/catalog/ChassisMobile.htm It may be what you are looking for? http://hoffmanamps.com/MyStore/catalog/images/IMG_8591.JPG I just finished building a high gain "Jose Marshall" 25 watt amp and it has no detectable hum. The reason...
by mwelch55
Tue Jun 19, 2018 7:54 pm
Forum: Garage Talk
Topic: Do not order from Wattstubeaudio
Replies: 82
Views: 14982

Re: Do not order from Wattstubeaudio

I only order chassis from him and it always takes a long time. I ordered 10 days ago and the status is still "Processing". I have always had this kind of delay from Watts, but I can't find a better deal on aluminum chassis. 17.5x8x2.5 chassis is 44.00 plus shipping. Does anyone know of a better sour...
by mwelch55
Thu Jan 11, 2018 2:55 pm
Forum: Technical Discussion
Topic: 60/40 solder. What brand
Replies: 23
Views: 1850

Re: 60/40 solder. What brand

My Dad was a TV repairman and he had several pounds of Kester solder from the 50s. I inherited the solder when he died in 1973. I have used about 2 pounds of it and still have about a roll and a half. Still good after all these years. Great solder. I have also used Radio Shack solder and it was good...
by mwelch55
Tue Dec 05, 2017 10:51 pm
Forum: Trainwreck Discussion
Topic: Express EL34 or 6V6
Replies: 6
Views: 2172

Re: Express EL34 or 6V6

So far, I've built 4 amps with 1 and 8 tied together. I'll continue to do so until I find a reason not to. The only advantage I see to not connecting 1 and 8 is for the grid stopper between 1 and 5.

Mike
by mwelch55
Tue Dec 05, 2017 5:55 pm
Forum: Trainwreck Discussion
Topic: Express EL34 or 6V6
Replies: 6
Views: 2172

Re: Express EL34 or 6V6

Thanks for the reply. That makes sense. It's the same as when I mount my screen resistors to pin 4 and 6 and attach B+1 to pin 6, only most if not all octal power tubes we use for amps don't use pin 6.