Recent Posts

11

Tube Amp Building - Tweaks - Repairs / Re: Please do not use VPN's

« Last post by acheld on December 07, 2025, 04:05:51 pm »

for at least 1/2 your members, we could start a tube-amp forum in the pokey!!!

And the other half us would be happy to listen from the outside!   

12

Cabinets-Speakers / Re: Advice on 12" speaker installation into closed box

« Last post by acheld on December 07, 2025, 03:57:20 pm »

For Hi-Fi yes.

I normally don't build sealed cabinets for guitar amps -- just my preference.   But I probably would try without first, and add it only if I didn't like the tone.

13

Tube Amp Building - Tweaks - Repairs / Re: Please do not use VPN's

« Last post by shooter on December 07, 2025, 01:12:05 pm »

 


goes for at least 1/2 your members, we could start a tube-amp forum in the pokey!!!

14

Cabinets-Speakers / Re: Advice on 12" speaker installation into closed box

« Last post by Khristophorous on December 07, 2025, 12:33:31 pm »

Do you guys ever put polyfil into a sealed cab?

15

Tube Amp Building - Tweaks - Repairs / Re: Please do not use VPN's

« Last post by EL34 on December 07, 2025, 11:53:59 am »

That's understandable considering Keir Starmer's goverment policies

Good thing I am not a UK citizen, they would arrest me.

16

Tube Amp Building - Tweaks - Repairs / Re: Please do not use VPN's

« Last post by kagliostro on December 07, 2025, 11:47:10 am »

I asked to ChatGPT to know the reason IMGUR necess a VPN to be accessed from UK

The response in because to avoid problems with the UK gov and don't wanting to adopt expensive solutions IMGUR decided to block the access to theyr's page to UK peoples

To obtain more info ask to ChatGPT and it will give you more details about young people protection and others

BTW, for similar reasons, also in Italy someting is changed, the access to some porn sites now require the registration to a third part database with full personal data, but this isn't a problem at all, don't have interest to access YouPorn or similar

All' started because using AI someone published lot of images and movies with some female member of the govern and some famous actress, so using the reason to protect young people the block of not registeted at the database

Franco

17

Tube Amp Building - Tweaks - Repairs / Re: 1968 Fender Vibrochamp AA764 Resto

« Last post by dude on December 07, 2025, 10:44:22 am »

I have a personal 67 Vibro Champ, wasn't as bad as the one you have. I made the decision to replace all the guts with new modern film resistors and metal oxide power R's and updated caps. Sounds fantastic, kept all stock values but that tiny OT at 5 watts does contribute to  the amps tone but I had an old 8 watt paper wound SE OT laying around, installed it. The Amp still has the original tone but just a little more clean headroom. The new OT was perfect for 8 ohms too. I took the original baffle bd with the 4 ohm speaker out and replaced it with a Jensen alnico 10" 8 ohm speaker and new baffle bd, grill cloth. I kept the original baffle with the original grill cloth and spk. I didn't butcher the amp, I can easily but it pack to stock, but the old R's and caps are gone, most were toast, kept original PT.
So, might not be an original component Vibro Champ but the OT and baffle can easily be put back, close enough. I guess it depends on the owners choice what to keep or replace but those components look pretty unreliable. Keeps us posted.   

18

Tube Amp Building - Tweaks - Repairs / Re: Please do not use VPN's

« Last post by shooter on December 07, 2025, 10:26:34 am »

normal websites got swept up in the decision process and blocked

gotta luv GuVminT solutions, bit like kill'n the baby, washing it n throwing it out with the bath water.

19

Tube Amp Building - Tweaks - Repairs / Re: 1968 Fender Vibrochamp AA764 Resto

« Last post by dogburn on December 07, 2025, 10:21:52 am »

Amp looks like it was left out on the front porch in Florida for a year. That's going to be a lot of work - good luck!

20

Cabinets-Speakers / Re: Advice on 12" speaker installation into closed box

« Last post by tubeswell on December 07, 2025, 10:21:41 am »

I use tee-nuts myself. M4 is plenty strong enough for a speaker and is dainty enough not to go over the edge of the speaker cutout. Even M3 is strong enough. Also, while you need the teenut to be firmly clamped in, you should achieve this by tapping it down from the front side before you tighten any bolt through it. The speaker nut/bolt doesn’t need to be wrenched down onto the baffle - you only need enough torque for a snug fit. Too much pressure will result in the basket being dented and twisted out of shape, permanently ruining the alignment of the cone.

With any guitar amp speaker (no matter what the speaker diameter is), the cutout should be exactly 1 inch less in diameter than the speaker for it to fit perfectly - whether it’s being mounted in front of, or behind, the baffle.