Univox U45B Correction and Sneak Peek at Live Stream Format

[@Guitarmike]

I did not get informed of this one. Glad I saw it on my feed. I got my coffee and it's awesome! Thanks for the tip and discount on my first order. You are the best sir!

[@Fixologist1]

Awesome, Mike.

[@chrisdecato]

I love that little amp!! I got mine 30 years ago and it's been my main recording amp since! Swiss army amp! Does it all!

[@matthewf1979]

It just hit me! They grid-leak biased the first stage to reduce noise!

[@philbarrows424]

That amp is super clean Mine has that “Mojo” on the speaker grill fabric 👍🏻👍🏻

[@EddieWinebauer]

i love that your watched videos and mine lined up almost perfectly on the side bar!

[@w13rdguy]

This is why I stay. Say what you want about Brad, but anyone questioning his integrity will come out the fool, in the end.

[@alexdeleon7135]

Agreed. His honesty, and modesty are hallmark to a quality channel host. I have known many amp techs. But none with genuine willingness to try every avenue to find a solution. He manages to solve any issue set before him. In an unselfish manner, he takes us along with him on each quest.

[@Andy_Yates]

I remember wondering what the 2nd ceramic cap was for, and just thought it was the coupling cap to the next stage. Glad you got it all sorted, and it sure did sound great in the main video! Hearing you and Johan Segeborn play Tele's really made me want to get one

[@Fixologist1]

Gotta havve a Tele. A lot of people think a Strat is a good stand-in for a Tele...not really.

[@Andy_Yates]

​@@Fixologist1 Yeah totally agree. I was always a humbucker fan til I met the tele. Now I just like them all, which sucks for my bank account

[@blkjckgtr3075]

Hey Brad that camera over the bench is way more clearer than your other one,love your channel,Cheers

[@morenoteslesstalk]

Univox is a brand I've always wanted to try, but they're nearly impossible to get in France or Europe. Recently, I had a great time playing on a Univox PHZ-1 phase shifter (relabelled BST LM-200 in France). If you're curious, my experimentations are up on my channel.

[@tiki_trash]

If you shine a light behind the circuit board you can see all the traces from the front. Cool! thumbs up, buddy!

[@tiki_trash]

I modded one of mine to be a common cathode bias on the preamp but grounded it to the board in a place that induced hum. Only one ground connection at the input jacks on these things. I'll eventually get around to putting it back to stock but the poor thing isn't getting played much. They're good sounding amps, just not loud enough. The other amp has a C12S with a large aluminum dust cover and that is definitely the better sounding speaker in my opinion. The one with the aluminum dust cover has front facing controls and negative feedback from the factory.

[@casperboo5465]

Your new set up is great Brad, good job, Cheers

[@kirkdesmond]

Hi Brad, From all your fans in Southern California

[@Fixologist1]

Hey Kirk!

[@isoguy.]

Hey, few dudes would be man enough to admit to having made a mistake. You get my vote buddy and really pleased to know even the experts dont get it right all the time. Great vid and thanks for sharing your skills with us. 👍 👍 👍 👍 👍

[@isoguy.]

Awsome

[@7125Mhz]

Aw heck, glad I found this second channel.

[@mischef18]

Neat that someone picked this up bro.

[@123spleege]

shit man, it still sounded like one of the best amps I ever heard. I used to lug around a Markley CD 120 at about 1000 pounds. Had crank the shit out of it to get the tone of this amp. And this this is so nicely wired

[@brianyork5510]

Damn it! I keep missing these. In keeping with the HDD kings I demand that you upload these at my convenience, especially the livestreams. I I I I me me me me lol

[@the-creech4790]

That was quick!

[@devohood7788]

Heck yeah. Good work Sir.🛠🍀

[@srtamplification]

I don't know if that second camera is going to work very well for the live stream. It seems to have some lag.

[@Fixologist1]

I'm still tweaking the encoder and stuff. It'll get better. Audio is already better from changes done after this video.

[@RickMichaelis63]

Awesome 😎

[@redjetfirebird]

Totally unrelated I noticed that you are watching some of the Joe Rogan stuff. I was never a real big fan of his or anything like that completely neutral towards him but I have to say he gets some really interesting people talking about really interesting things on this channel and I like it a lot.

[@Fixologist1]

Yeah, it's stuff you can put on and just listen and do other stuff.

[@MrMeadfoot]

Lee Roth was a hard watch.

[@redjetfirebird]

Yeah, pretty wild he became an EMT in NYC post Van Halen!!

Brad, have you ever done a video that shows you how to measure the output impedance of an amp without a speaker? There are a lot that suggest they will, but always refer to the speakers. But sometimes amps don’t have speakers attached, you get just a chassis or you may suspect the speaker present is a swap and suboptimal. There is one guy who does use two 4 ohm capacitors to confirm his amp and speaker are 8 ohms, but I wondered if you might have covered that anywhere. If that’s a stupid question, my apologies, but it’s question I have faced and cannot find the answer. Well, not in the context of guitar amps or in language I can understand. Thanks and keep up the excellent work.

[@georgekrabs6948]

More likely 4 Ohm resistors , not capacitors.To find a given output impedance of an output transformer you need to inject an AC voltage through the primary and measure the secondary voltage then work out the turns ratio etc. best left for a pro to do These things can be dangerous for the unskilled and guys like us need to have work to do to survive

George Krabs You’re quite right, George, I should have put resistor, but I was not long up and hadn’t got my head straight. I’m not trying to deprive any pros of work. I have an old solid state chassis with no indication and can’t find a schematic or even any specs for this model and wondered if there was a way of determining the load and drawn a blank. This isn’t worth spending any money on. I got it for peanuts and will fix a couple of blown capacitors and renew the old ones, too. But it’s just not worth anything much, isn’t very special and holds no sentimental value for me. Or else I’d take it to a pro. Thanks for your response.

[@georgekrabs6948]

@ Being solid state you need to measure the power supply voltage to determine the power handling into a given speaker impedance and subject to the amount of output transistors how low this impedance can be.8 Ohms should be fine in most situations. If it's an IC amp device the specs should be on the web. Cheers mate

[@freepress8451]

1 meg or not 1 meg, what are the real pros and cons? You say at the end it is a testament to the build quality

[@freepress8451]

Explained on main channel by tiki torch

[@dougchristopher2072]

If I’m not getting notifications how would I know I’m not? 🤔

[@Fixologist1]

If you click your notification bell in the top right of your screen, you'll see a list of any notifications, including my new videos if you have them turned on

[@roncarter2188]

Anyone have a schematic I could get of this amp, thanks.

[@MoMo-xb7nr]

If you ain’t getting notifications, KZbin personally hates you, so hate em back. But first..... FLEX!

[@bucknuts6762]

I have one of these amps that needs work on its like the one your doing I believe its a 15 inch speaker in it I could send you a video of the electronics in the chassis I am willing to pay you of course for repairing it if your interested? your video's provide a lot of input on electronics, thank you for posting

[@grega4607]

Hey Brad, I am a faithful new watcher and wanted to hit your sponsor both to try their coffee and help the channel. It appears that both the .com and the Facespace for Silver Falls Trading Co are dead. Just a heads up for ya.

[@Fixologist1]

Well that's too bad. I hope the situation isn't permanent.

[@nelliejones1]

Integrity is in short supply in this day and age. That being said, shoot a price on that friggin Tele....

[@lainemartinez9374]

hi i got the same amp with no fuse can you tell me what type of fuse to use now days ?thanks

[@Hurtsilverio]

Do you do repairs still? Or can I get some advice? . I just bought a used fender Stage 100 clean channel don’t work and I’m sure the speaker is blown. Any info would help

[@mstecker]

Wouldn't you need to get to the underside of that board to properly replace that resistor?

[@Fixologist1]

No way to reach the pads for that resistor because they were slightly under the chassis. Not exposed.

[@mstecker]

Guitologist Channel 2 So, in general - can one do a component replacement from just the topside? I guess it depends on what the solder under there looks like, no? Would you say you could do it in most cases? Almost all? I guess with enough experience you can feel whether it held tight and made contact? If it were a modern board with little machine flowed joints, would you think differently?

[@kindnick58]

Flex!

[@tomfoolery2082]

What would that person gain by fixing up that schematic and putting it up online .

[@Fixologist1]

I think they were showing what they'd done to their amp in terms of mods and they did it in sucha way you can't tell it's not the original. Doubt it was on purpose, probably just being anal.

[@freepress8451]

@@Fixologist1 You have said this many times - amps were constructed when voltage was 110v now it is 120v so surely there is some flexibility

[@staftsekouras7900]

😎🇬🇷🎸🎼👍✌

[@budandbean1]

What’s the deal with live streams? Is this something people really like or want to see? I’m just curious because frankly I don’t get it. I enjoy KZbin because I like to learn stuff and usually do watching a good quality video, many times HD, with decent audio. So bring in the live feeds with typically lousy video and spotty audio. The first ten minutes of most live feeds are of the host asking if anyone can see and hear them all the while they stare at an unseen co outer screen. The person running the live feed almost always complains that they can’t read the comments fast enough, that they can’t get the camera switcher to work right, and have to restart their software numerous times just to get through a feed. I just don’t see what the attraction is, at least from the perspective of the subscriber. I used to check to see if they were watchable but now I just skip them. Maybe the attraction is that it’s easier for the streamer. They don’t have to work to produce a video and go through the hassles of uploading it, which I can certainly understand.

[@Fixologist1]

I cannot answer everyone's questions I get in emails and PMs. This might be a way to interact in real time and maybe get to some of these questions without making hour long edited videos. I can bring up a schematic on the fly and we can all look at it together. I can discuss possible mods, or repairs, or whatever.

[@MyBichSustained]

it's a way to talk to him.....if you have a question and want to get a answer quick give him a superchat(money) if you want to. The more money he makes like any other business helps produce more vids!

[@budandbean1]

That’s what I was curious about, thanks. So it’s really easier for the host... and like I said, I can understand that.

[@OtherTheDave]

Guitologist Channel 2 Yeah, that’s mainly why I watch them (when I have time, anyway).

[@budandbean1]

@Golden Apple I have to say, you are the man! Enough said!

[@zacwright2162]

Hey Brad I sent an email about my u45b to your Gmail hope you see it

[@leejamestheliar2085]

I am banned! 😒 a x us navy ET disabled and banned, not band, banned!!!!!!

[@DDE_ADDICT]

brad are you pregnant or just getting old

[@Fixologist1]

Old an pregnant with aliens.

[@freepress8451]

@@Fixologist1 Hahaha please don't get all hormonal on us