You're an absolute wizard. I had a hifi and tv repair shop back in the 70s. You are where I'd like to have seen myself if I had remained in the trade. Very well done on your excellent videos :)

@michaeldranfield7140

2 жыл бұрын

your not missing that much now then , with no service information for most stuff its getting hard to repair anything ., I would much rather go back to the 70 s .

I was waiting for the meter probes to slip, BANG ! all that work up in smoke, nice repair MD

@michaeldranfield7140

2 жыл бұрын

Won't be the first time that's happened.!

Really impressive Michael

Very good job! 👍

Lots of fake components about, it's a pain sometimes. But there are "good" fakes available, that are hard to spot, so like you I check them against an original when I can and check the gain or other electrical characteristics. A good video to highlight this growing problem. Sometimes there's no equivalent component available so you're forced to buy these dodgy uncertain parts and just test them as best you can to see if they make muster. It feels like a shrinking world sometimes. It used to be just the old kit that you couldn't get parts for, but nowadays even the modern stuff is full of unobtainable components. There's a movement I think in America called Right to Repair. I hope they make some progress and manufacturers start to produce kit with a view to making parts available to repair them. The cynic in me says that won't happen.

@michaeldranfield7140

Жыл бұрын

Manufactures bring this problem on there selves , if they were to supply parts in the the first place there would be no need to trawl the dodgy web looking to spares .

Excellent, as always. You did make me laugh when you said Radiospares. The diode resistor circuit connected to the MOSFET gate confused me initially (but that's not difficult these days).

@michaeldranfield7140

2 жыл бұрын

I think the diode, resistor is to discharge the gate capacitance when the mosfet turns off, when RS first started off they sold parts for radio and TV sets, I still have mains droppers here that radio spares sold in the 70s, may even have an old catalogue somewhere.

@ralphj4012

2 жыл бұрын

Thanks for the explanation. Ah, the memories, I still have packets of components with the yellow Radiospares labels and remember the multi-volume catalogues.

@michaeldranfield7140

2 жыл бұрын

That's another distant memory, catalogues, everything is now on the dreaded Internet.

@jackgarrison8497

2 жыл бұрын

@@michaeldranfield7140 Radio Spares is that The British version of Radio Shack?

@michaeldranfield7140

2 жыл бұрын

​@@jackgarrison8497 Maybe one day they were in the early years but now RS components is a mega supplier to industry , they are expensive but everything is top quality and account holders get next delivery, they are not for everyone as been an industrial supplier some components are supplied in packs of 10 , 50 , or even 100 but I don't mind that as I like to keep well stocked up with components as I do this job for a living .

Standardize that test material genre... Nice work!

@michaeldranfield7140

2 жыл бұрын

glad you liked it .

It is getting harder to find genuine components these days, I had the same problems with an STK amp chip, finally found a good ex equipment replacement. I use a cheap USB microscope, certainly works well enough for my needs. Although I try to avoid surface mount stuff, I always end up getting more to repair.......

@michaeldranfield7140

2 жыл бұрын

Unfortunately that's the was things are these days I waste a lot of time trying to source genuine parts and this is all time you don't get paid for.

That old black and decker drill and stand looks like new.

@michaeldranfield7140

Жыл бұрын

the drill is brand new, its old stock from the earley 1980s , I have another new boxed drill also but its 10mm and in blue, the stand may look new but I bought that late 70 s .

Thanks for the informative video. Ive check mine the 5.5 volatage is flactuating is that something to do with voltage regulator? Where can I find tge service manual diagram?

@michaeldranfield7140

11 ай бұрын

just do a google search for the service manual , it may take sometime to find a free one though !

I know, at one time a small mains transformer was quite adequate.

@BTW...

Жыл бұрын

yes

I would recommend Farnell components I always have mine from there when I repair something.

@michaeldranfield7140

2 жыл бұрын

Yes I do have an account with Farnell as well, but with RS i get free delivery , with Farnell you have to spend over £40 to get free delivery , so who I buy from all depends on the size of the order.

@sw6188

2 жыл бұрын

@@michaeldranfield7140 Is RS in UK still giving free shipping regardless of the size of the order? Here in NZ, they recently changed their policy and now you have to spend at least $70 to get the free shipping. I think they were losing money with people placing lots of small orders on a regular basis. All of the RS supplied components to here have to be sent from Sydney, and from further afield including UK if Sydney don't have them in stock.

@michaeldranfield7140

2 жыл бұрын

At the moment it's still free delivery to account holders over £5, With Farnell you have to add spend over £40 to get free delivery.

@sw6188

2 жыл бұрын

@@michaeldranfield7140 That's interesting to hear. I have an account with RS but still have to pay delivery if the order is under $70 NZD.

@mattsan70

2 жыл бұрын

@@michaeldranfield7140 You can set up a non-credit trade account and only pay £2 service charge free delivery with farnell - I am a hobby repairer and use Farnell more than RS cos works out cheaper usually for low volume orders.

Hi was watching your video on making a solid state el84 valve. Reason being valve shortage due to the Russia and rest of world disagreements. Just wondering if it’s feasible to replace my el84 power amps for home made solid state? I assume I would need to replace them all because they need to be matched, but I wouldn’t have a clue on that.

You are edited out the best parts. For instance, how do you resolder surface mounted parts? What is your heat source?

@michaeldranfield7140

2 жыл бұрын

For small parts just a soldering iron and flood the component with solder, but if your doing big chips I now use a hot air soldering station .

Hey, i have received an amplifier Yamaha AV Receiver RX-V585 from USA and i would like to ask how can i get the power board of it because we plugged into 220V outlet. Thanks

@michaeldranfield7140

Жыл бұрын

Not sure if you will be able to buy a new board or not but as there is a service manual available you should be able to repair your old board , I would have thought .

Problem at the moment its been impossible to get buyers into Shenzhen since late 2019 to check anything due to Covid regulations. Even Chinese nationals have a 21 day isolation. Your relying on local buyers and people already there. However turnover of people means every year its natural for 20 of people to return home and cannot be replaced so you lose 20% of your buyers existing contacts.

Were the fakes from ebay or a more reputable source?

@michaeldranfield7140

2 жыл бұрын

They came from ASWO one of the only trade suppliers left for component for the service industry, if I had bought them from e Bay I would have expected to receive fakes.

why oh why sutch complexity for a stand by circuit.

@michaeldranfield7140

2 жыл бұрын

I know , at one time just a mains transformer was good enough .

@BTW...

Жыл бұрын

@@michaeldranfield7140 You will probably find that 5.5v rail powers up or provides a logic 'go', to a lot of circuits.. maybe every board in the case. Kinda needs a precision.

Did I see your fakes were from Farnell? I hope I'm wrong, you don't expect doggy stuff from a compony like Farnell.

@michaeldranfield7140

2 жыл бұрын

No the fakes didn't come from Farnell, it was the TO220 insulating bushes in the Farnell packet.

Looks like fake parts were from Aswo oh dear perhaps unintentionally

@michaeldranfield7140

2 жыл бұрын

You got it.