On the question of Fusing It is a Carver. So has a controlled primary on the "Power Core" it is phase controlled from the mains. All of Bob Carvers amps are like that except the earlier Phase Linear models. High inrush is common & quitenormal
@@peterlarkin762 aah yeah forgot the Transfer Function units. Silver 7 too IIRC I used to be UK warranty & service manager. So very familiar but it been a while. I got a few Carvers here some need repairs. Not really bothering with them Save them for when I get bored & throw them on the bench
Please make a video on Speaker wires (oxygen free copper wires) and what's difference between them and normal Electrical wires and what will be difference in sound if we use normal Electrical wires to connect speakers to amplifier than using those special speaker wires which many companies say it will dramatically improve sound quality
I found an article from audio magazine 1985 I read ages ago. It said there was a magnetic shunt in the power transformer that formed a tank circuit with the output caps. That the voltages were clamped with a zener I guess and the difference between the transformer output voltage and the voltage rail was stored in the magnetic shunt and fed back into the circuit when the transformers voltage drops below the clamp voltage. I would guess thats why you can not find a replacement transformer. Does this make any sense ? thank you great video
There are no shunts in the transformers of the two units I have. Voltage is controlled by a triac circuit that monitors the rail voltages and audio signal. It is all described in the service manual. Perhaps that article refers to another amp.
The only thing unique about the "magnetic field" amps is the thyristor in the power supply. It's supposed job is to throttle the power depending on the demand of the music. I think Bob Carver named it that more for marketing rather than technical reasons. Back in the late 70's and early 80's the competition was fierce in the audio wars, any edge over the competitor was taken. Maybe I'm wrong
Bob Carver was a brilliant engineer and knew how to sell products with words. I would highly recommend searching out his early promo video where he teaches a room full of hifi dealers about his amps. He had a fantastic sense of humour.
Hi I'd be willing to buy it from you that way you can buy the other parts to fix the other one. I can do it through Paypal if your willing to sell it. 🎶💯👍👌✌️
this is so awesome John!!! thank you for cracking these carvers open! I always wanted to take a gander at one of his boards!!!
On the question of Fusing
It is a Carver.
So has a controlled primary on the "Power Core" it is phase controlled from the mains. All of Bob Carvers amps are like that except the earlier Phase Linear models. High inrush is common & quitenormal
TFM series also had a standard primary.
@@peterlarkin762 aah yeah forgot the Transfer Function units. Silver 7 too IIRC
I used to be UK warranty & service manager.
So very familiar but it been a while.
I got a few Carvers here some need repairs.
Not really bothering with them
Save them for when I get bored & throw them on the bench
Thanks for the update!
So what John needs is for his loyal viewers to visit some of his back catalogue and let the ads roll for a bit.
Great stuff sir, realmente learnt a lot, cheers Jhon.
Enjoyed it. Thanks for sharing.
Please make a video on Speaker wires (oxygen free copper wires) and what's difference between them and normal Electrical wires and what will be difference in sound if we use normal Electrical wires to connect speakers to amplifier than using those special speaker wires which many companies say it will dramatically improve sound quality
I sure need you to go through my Cube........and a other pre-Carver Phase Linear pre-amp
Great video you're doing a awesome job 👍💯👏👏👏🤗 thank you for sharing.
I found an article from audio magazine 1985 I read ages ago.
It said there was a magnetic shunt in the power transformer
that formed a tank circuit with the output caps. That the voltages
were clamped with a zener I guess and the difference between
the transformer output voltage and the voltage rail was stored in
the magnetic shunt and fed back into the circuit when the transformers voltage drops below the clamp voltage. I would
guess thats why you can not find a replacement transformer.
Does this make any sense ? thank you great video
There are no shunts in the transformers of the two units I have. Voltage is controlled by a triac circuit that monitors the rail voltages and audio signal. It is all described in the service manual. Perhaps that article refers to another amp.
Why is it called "a magnet field" amp?
The only thing unique about the "magnetic field" amps is the thyristor in the power supply. It's supposed job is to throttle the power depending on the demand of the music.
I think Bob Carver named it that more for marketing rather than technical reasons. Back in the late 70's and early 80's the competition was fierce in the audio wars, any edge over the competitor was taken. Maybe I'm wrong
Purely marketing wank. They are good, punchy amps, but the "Magnetic Field" name is stupid. I bought two of them in the mid-80's and still have them.
Bob Carver was a brilliant engineer and knew how to sell products with words. I would highly recommend searching out his early promo video where he teaches a room full of hifi dealers about his amps. He had a fantastic sense of humour.
Is the one really worth saving? $40 is a pretty big investment. You could Carver it up for parts.
Best sounding analog diy amp out there?
Great AMPS
Hi I'd be willing to buy it from you that way you can buy the other parts to fix the other one. I can do it through Paypal if your willing to sell it. 🎶💯👍👌✌️