'64 Fender Deluxe | Diagnosing Blown Fuses

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Psionic Audio

2 жыл бұрын

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Пікірлер: 28

@BradsGuitarGarage 2 жыл бұрын

Good to see I'm not the only one that spends half a day writing 1000 word job sheets!

@mattchase3153 2 жыл бұрын

I can only imagine, Brad. “Caps rooted, board covered in splooge. Previous tech had brain fart. Still has output hum. Thanks Mesa Engineering!”.

@BradsGuitarGarage 2 жыл бұрын

@@mattchase3153 I'd hardly be able to differentiate between jobs if that were the extent of the specifics. Lol!

@weschilton 2 жыл бұрын

Well isn't this very timely! I finally took the plunge and changed out my '67 Deluxe Reverb's filter caps. And I have to give you a HUGE thank you for these videos, which not only gave me a really good guide as to HOW to do it, but WHY and HOW to do it right. If you are interested I will email you photos!

@edwardhannigan6324 2 жыл бұрын

Nice video, great walk thru and fault finding methods..You sure know your stuff...Learning all the time..Ed..uk..😀

@PittsS2C1 2 жыл бұрын

I love watching a PRO do that which they do so well. No “parts changer” tech wanna be here.

@zbaby82 2 жыл бұрын

Good video.

@danielsaturnino5715 2 жыл бұрын

She is a beauty. I see why one would avoid to shotgun the caps.

@tiuskilin2573 2 жыл бұрын

Hi PA, got a off topic question. I got a 68 Custom Fender Princeton and when i turn it on it makes crackling noise for a few seconds. Then the amp sounds normal and everything is fine. Would the first thing to check the pre amp tubes and is this always the sign of a bad tube? I enjoy your videos a lot 👍🏻 Greetings from Germany

@almoreno8852 Жыл бұрын

I have a Super Reverb blowing fuses. The screen grid resistors are measuring around 600. Waiting for parts. Could that be the cause?

@mgreene888 2 жыл бұрын

I enjoy your channel. I must vent some frustration however - and not just about you - I have seen other utube guys do it too. Why not just start with testing the tubes as a matter of course?

@PsionicAudio 2 жыл бұрын

What is it you think I just did? Because it looks like careful testing of tubes on this end.

@mgreene888 2 жыл бұрын

@@PsionicAudio I meant start with testing the tubes on a tube tester - before anything else.

@BradsGuitarGarage 2 жыл бұрын

@@mgreene888 Most tube testers are useless. They either test irrelevant parameters or test the tubes at 1/3 of the voltages to amps throw at them. The ones that aren't useless cost upwards of $5-10k and require constant calibration. I'm equally sick of people shoving their tubes in a cheapo tube tester, then saying "great, the tubes test good", then pull their hair out over a failing tube that the tester did not detect.

@mgreene888 2 жыл бұрын

@@BradsGuitarGarage People say that but I find that a simple emission test can weed out a lot of bad tubes before doing any thing else - especially when the amp and condition are unknown. Dont take this as criticism of you or your methods, I would trust you as a tech for my gear - but I have seen more than one guy on Utube flail away and throw the "kitchen sink" at an amp with no results and then as a last resort finally tests the tubes, and hey guess what?

@bluesbondsman Жыл бұрын

Every ruby 5ar4 I've dealt with in the DRRI's have rattled. Not one good one in the many!

@1Dougloid 2 жыл бұрын

I didn't see the part where you were measuring dissipation. What is your method?

@PsionicAudio 2 жыл бұрын

I'll DM you. Too dangerous to include in the videos and have someone zap themselves trying to monkey do.

@1Dougloid 2 жыл бұрын

@@PsionicAudio Grazie. Molto bene.

@cgavin1 2 жыл бұрын

(Briefly as I know you are busy dude) but why aren't you a fan of the cathode/bias caps? I personally find them really useful?

@PsionicAudio 2 жыл бұрын

Because most home biasers use bias measuring plugs which have their own 1 ohm Ck and they might not know that they would then need measuring across one of two 1Rs in series. Because it includes the screen current and a good tech should know how to measure only the plate. Because it introduces a new point of failure. Because in amps with external bias measuring points the end user is chasing a mA reading but won't know the plate voltage. So they're just approximating a bias measurement.

@cgavin1 2 жыл бұрын

@@PsionicAudio I hadn't considered any of those things. I really enjoy your content and hearing from you in comments and getting insight in to things from a "I have to deal with this every day" perspective. Cheers for taking the time. o7 PS: I think the AC30CC is fine stock. :P

@Toymortal 2 жыл бұрын

This is off topic and a question to Lyle or any techs out there. I'm a musician who does the occasional repair and tinkers with electronics and my supply of good quality leaded solder just ran out. Can anyone recommend a good quality/brand of solder to buy in order to work on audio electronics? I'm based in the UK. Thank you to anyone who replies. My apologies if this sounds like a very basic dumb question. I used to go and buy from my local electronics shop, who I could trust to stock good stuff. They have since shut down and when I looked around online - there was just such a massive variety that I have no idea where to start!

@PsionicAudio 2 жыл бұрын

I use Kester "44" 60/40 .031. I'm sure they'll have a distributor there. Aha (I'll leave you to convert .031" to mm): uk.farnell.com/c/tools-production-supplies/soldering-stations-accessories/solder-wire?brand=kester-solder

@Toymortal 2 жыл бұрын

@@PsionicAudio Thanks Lyle! Much appreciated.

@Toymortal 2 жыл бұрын

@@PsionicAudio Just got hold of some Kester solder and done a few test solders to get back in the swing - and it's excellent stuff. I'm modding a cheap MXL990 microphone, which thanks to using through hole components has a good upgrade path. Not sure I'm going to go with the 'official mods' though - I may try a few things out and use my ears as the judge. Thanks Lyle, both for the advice and for inspiring me to pick up the soldering iron more often!