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Vox AC30/6TB - Grounding, Hum, Buzz, Influenza

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Lyle's videos showing several of the issues this amp had:
Psionic JMI+ Mods& Ground Loop Removal On Vox AC30/6: • Psionic JMI+ Mods& Gro...
Level Up Your TBX! | Easy Ways to Improve Your Vox: • Level Up Your TBX! | E...
Webpage: www.bradsguitargarage.com.au
Facebook: bradsguitargarage
Instagram: / bradsguitargarage
Equipment:
Soldering:
Pace MBT station w/SX100 & PS-90 handpieces
Hakko 474 w/815 handpiece
Hakko 936 w/907 handpiece
Hakko FX-888D w/FX-8801 handpiece
Quick 861DW hot air station
BOFA fume extraction unit
Loctite Multicore solder (C511 / 362)
Test Equipment:
Fluke 11, 175, 177 & 179 handheld DMM's
Tektronix 2236 analog oscilloscope
Rigol DS-1054z digital oscilloscope
BK Precision 4017A sweep / function generator
BWD 160a function generator
HP 6236B triple output DC power supply
Kyoritsu 3132A insulation / continuity tester
Video equipment:
Overhead cam: Panasonic HC-V785 w/Audio Technica AT9946CM mic
Handheld cam: Panasonic DC-G85 w/Olympus M.Zuiko Pro 12-40mm f/2.8
On location cam: Panasonic DC-GH5s w/Panasonic-Leica 9mm f/1.7 & 12-60mm f/2.8
Capture card(s): Magewell HDMI USB, ATEN UC3020-AT, ATEN UC3021
Headset Mic: Audio Technica BP892xcW-TH
Lapel Mic: Rode Go
Editing: Adobe Premiere Elements
Hand Tools:
Wiha, Felo, Stanley screwdrivers
CK & Engineer cutters / pliers
RS Pro wire strippers
Sidchrome & Gear Wrench spanners, sockets & shifters
Veritas planes & chisels
Materials / Consumables:
JJ's / TAD electron valves
Elixir / Ernie Ball / D'Addario / Rotosound strings
Electrolube & DeoxIT cleaners, lubricants & chemicals.

Опубликовано:

5 сен 2024

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Комментарии : 65

@RobbieF 9 месяцев назад

Hope you feel better soon, Brad! Thank you for the video 🙂

@faultlessguitarsandamps1116 9 месяцев назад

That was interesting to see that the hum balance resistor values were best at 100R / 220R in this instance . Another champion informative video . Cheers

@BradsGuitarGarage 9 месяцев назад

Yeah, they can often be optimal when imbalanced somewhat. A good little trick to make your amps quieter than the competition.

@matthewf1979 9 месяцев назад

You a the champion, Brad. I stay in bed when I get sick.

@BradsGuitarGarage 9 месяцев назад

No choice when you're self employed, mate. Pay the bills that month or close the doors for good.

@randysteffes97 9 месяцев назад

You’re a champion. Feel better soon.

@fiddlix 9 месяцев назад

Excellent job there…now you be a champion and take it easy so you can get over that funk you have. See you on the next one mate.

@craigthomson3621 9 месяцев назад

There was a limited run of UK manufactured hand wired 60th anniversary VOX AC15HW60 (based on JMI 1960 AC-15/4), and VOX AC30HW60 (based on JMI 1964 AC-30/6 Top Boost) amps launched in 2017. They have long since sold out but occasionally appear on the second hand market and are well worth checking out.

@BradsGuitarGarage 9 месяцев назад

I hope to get my hands on one of them one day, along with the rare handwired Orange units. Rarely seen an amp I can't improve, but serviceable construction methods certainly help!

@stevencollins_uk 9 месяцев назад

Get well soon, Brad. Thanks for the videos.

@canaan_perry 9 месяцев назад

This sounds great when you demo it at the end.

@velutumbra 9 месяцев назад

Get better, Brad. Thanks for another great one.

@jasinow 9 месяцев назад

Those amps sure do cut a great sound. Great job and get well soon.

@robertbarnes9745 9 месяцев назад

Great work! Get well and feel better soon!

@matthewf1979 9 месяцев назад

So that's where John and George went? In the bottom of a Vox cabinet?

@mcpattrsn 7 месяцев назад

How did you cut those traces so cleanly? Well done sir!

@marknielson2099 9 месяцев назад

Didn’t understand any of it (electronics) but I was amazed! Very enjoyable..from a dumb guitar player!

@terrydemol5354 9 месяцев назад

Nice job Brad. This is one of those "lots of little things add up to a pretty big job" scenario. I see an AC30 in your future or maybe build one! :) I've owned a modded CC2 for many years and it just inspires you to play better. Get well mate, you push yourself pretty hard.

@BradsGuitarGarage 9 месяцев назад

Yeah, took a few bites to quieten it down, but now it's whisper quiet.

@diegocastro5114 9 месяцев назад

Brad, you are my hero.

@BradsGuitarGarage 9 месяцев назад

Does that mean I get to wear my underwear outside my pants now? Oh wait, that's "superhero", my bad. I'm doing it anyway.

@fletches4084 9 месяцев назад

Nice work there. Can't help but wonder who "b/wired sarah" was?

@andrewhorne7443 9 месяцев назад

Thanks for the hum dinger trick Brad. Get yourself some cough lollies. Hope you feel better soon.

@BradsGuitarGarage 9 месяцев назад

Will do, mate! Thank you!

@tedmich 9 месяцев назад

What a trooper! Get as much rest as you can and thanks for the vid! I agree on the vibrato, it should be like BBQ: low and slow.

@BradsGuitarGarage 9 месяцев назад

I'd like to go way slower, but will get the customer to try it out first. Nothing like a lovely slow, swampy trem!

@paulblain9881 9 месяцев назад

nice work Brad!

@twitchbook-1 9 месяцев назад

cheers

@TotallyTuberous 9 месяцев назад

Nice work! Get well!

@danielsaturnino5715 9 месяцев назад

Take care mate. Thanks

@Maxime1602 5 месяцев назад

Hey super cool video, what is the value of resistors on 19:27? :)

@thatampguy 9 месяцев назад

Nice work, as always.

@BradsGuitarGarage 9 месяцев назад

Good to see you over here, buddy!

@thatampguy 9 месяцев назад

Long time lurker 😂

@BradsGuitarGarage 9 месяцев назад

Love a good lurk.

@ghostface_grilla1155 9 месяцев назад

Another great repair 👊😎

@BradsGuitarGarage 9 месяцев назад

Thanks for watchin' yet again, mate!

@jimgibson9811 9 месяцев назад

Nice work

@dcallan812 9 месяцев назад

What a right bodge on the valve sockets it looks like a 5 year old did them. I know they were cost saving but just open the door you cant solder through the fecking letter box. 🤣🤣 Interesting rework 2x👍

@hisproperty1438 9 месяцев назад

G'day Brad, Yeah... I don't think an animation with voiceover will help. You might be better off with subtitles, like they use on TV's fruit channels. 😁 Anyway, thanks for another great video. You take it easy, & get well soon. Andrew BTW, I hope you don't have 1 of those friggen "don't-make-me-laugh" type flu.

@goodun2974 9 месяцев назад

Not having worked on any Vox amps I didn't realize they run the speakers in *series*, for a presumed 16 ohm load here. Is that normal for Vox amps with 2 speakers? ( edited because I had written parallel when I meant to write series, duh; a facepalm moment!)

@BradsGuitarGarage 9 месяцев назад

No, it's in serial, just a neatly twisted pair. 16 Ohm output (there is a green wire soldered to a terminal with no connection on the PCB, that's the 8 Ohm tap if required.) 2 x 8 Ohm greenbacks in series.

@goodun2974 9 месяцев назад

@@BradsGuitarGarage , I meant to write series. Silly me!

@YeatzeeGuitar 9 месяцев назад

Yeah both my vintage ac30's are series 8ohm speakers for 16ohm

@BradsGuitarGarage 9 месяцев назад

I've been meaning to check out the recent developments @YeatzeeGuitar I'll check em out over the weekend and say g'day.

@YeatzeeGuitar 9 месяцев назад

@@BradsGuitarGarage get some rest, they're not going anywhere

@twitchbook-1 9 месяцев назад

i hope you health improves

@BradsGuitarGarage 9 месяцев назад

Thanks mate, starting to get better, no biggie.

@goodun2974 9 месяцев назад

Brad, compared to most of the amps we hear you play through, this one seems to make you rethink what, and how, you're going to play. Or is it because of the flu? 🤔😉

@BradsGuitarGarage 9 месяцев назад

A bit of everything to be honest, mate. Haven't been in the best state of mind with the flu and work stress and everything, so maybe that's it. I plan to control the intake of work a bit more stringently in the new year and hope to work on my playing more, so hopefully it gets tighter, more accurate and versatile. I still don't want to be a show-off. I want to show real-world use scenarios which 90% of the time is rhythm playing.

@terrydemol5354 9 месяцев назад

Good observation. Just knocked through a bunch of Marshall repairs, all sound as they should. Plug into my AC30 and it craps over every one of them for beautiful clean tone / slight breakup that inspires music played with feel and imagination. The sign of a good amp -> you aren't playing the same $hit but are inspired exploring new possibilities.

@goodun2974 9 месяцев назад

@@BradsGuitarGarage , well, you, and the amp, sounded quite good together ---- and you didn't go all "metal" on it! 👏👍

@goodun2974 9 месяцев назад

@@BradsGuitarGarage , PS, get some sleep, and hope you feel better real soon!

@BradsGuitarGarage 9 месяцев назад

@@goodun2974 Thanks mate. PS, a lot of what I play is to try and trigger a fault or weird performance, like testing for intermodulation distortion around 27:35