Search found 13 matches

by GusGus
Mon May 24, 2021 9:47 am
Forum: General Tube Audio Based Discussion
Topic: Preamp vs Power amp gain
Replies: 3
Views: 1135

Preamp vs Power amp gain

Hi, This may be a stupid question, but here goes. I have a computer outputing USB to a Modi 2 DAC, connected to an Elekit TU-8200R amp running KT88 tubes. So my computer has a volume knob and so does the tube amp. Is there a magic combination of gain settings for best sound, or is it a case of exper...
by GusGus
Fri Mar 05, 2021 7:36 am
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

Good Luck,
Have a look on you tube for Tomlin Leckie. He does great lessons from beginner up.
by GusGus
Thu Mar 04, 2021 8:22 am
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

Hi GusGus, Excellent work! Your tolex work is impressive! What sort of adhesive did you use? As for shielding, screen, perforated metal, copper foil, aluminum foil, sheet metal, and shielding paint all work. However, if you're not getting bothersome noise pickup or hum, they may not be necessary. W...
by GusGus
Sun Feb 28, 2021 3:59 pm
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

Wow! I've never seen a heavy-duty wire-wound potentiometer used in a guitar effects pedal! But if you had it lying around and the value is right, why not? It's a rotary L-Pad controller. The design page is here with the explanation of how it works https://guitar.com/guides/diy-workshop/diy-workshop...
by GusGus
Fri Feb 26, 2021 2:09 pm
Forum: General Tube Audio Based Discussion
Topic: Sensitive speakers
Replies: 14
Views: 3584

Re: Sensitive speakers

If you can build a simple box and enjoy that kind of thing, you might look at some of the kits from DIY Sound Group. They have numerous designs in the 91-99db sensitivity range. Many come with pre-routed baffles. The specs look to be real measured numbers - not Marketing Department exaggerations. S...
by GusGus
Fri Feb 26, 2021 8:33 am
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

Here is the back finished https://i.ibb.co/LSZ0V60/IMG-20210226-082353.jpg I also built an attenuator from plans I found on the net. It gives a great overdriven Chicago blues sound without rattling the windows and making the dogs howl. https://i.ibb.co/ch7cyLW/IMG-20200424-115137.jpg https://i.ibb.c...
by GusGus
Fri Feb 26, 2021 8:18 am
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

Nice! Love the look of that alligator-pattern covering. Did you bend the chassis yourself? Looks like a single sheet of aluminum (or what you might call aluminium, I think). Just curious - Will the back cover include metallic shielding (such as metal window screen, adhesive copper foil or aluminum ...
by GusGus
Fri Feb 26, 2021 8:17 am
Forum: Aesthetics, Look & Feel
Topic: Harmonica Amp
Replies: 13
Views: 3633

Re: Harmonica Amp

pretty cool. homegrown or commercial? I started with a really cheap old Marshal amp case that belonged to one of my kids from years ago. I stripped it, then made up an aluminium chassis to fit. I got the Kalamazoo schematic from the web and then designed and built it from parts. It uses a 6X4, a 12...
by GusGus
Fri Feb 26, 2021 8:03 am
Forum: General Tube Audio Based Discussion
Topic: Sensitive speakers
Replies: 14
Views: 3584

Re: Sensitive speakers

Of the Altec speakers you could POSSIBLY encounter in the wild the 604C will be the most " common"....but be aware the crossover network is almost impossible to recap ( N1600} ,a quick ohm meter test will let you know if the HF and LF drivers are good ....the 601 has blown tweeters a lot ...
by GusGus
Fri Feb 26, 2021 8:02 am
Forum: General Tube Audio Based Discussion
Topic: Sensitive speakers
Replies: 14
Views: 3584

Re: Sensitive speakers

Hi,
Floor Standers are out of the question for this application. Monitor types from Klipsch are around 93db, rather than 97 for the floor standers. How much of a difference will this make in the real world?

I'm not looking to spend more than £700