Topic: Cayin A88t - Biasing

[bey]

Nga kapatid tulong naman.
Kailangan ko ng Profesinal tech para i-bias ang Cayin A88T, home service sana kung pwede.
Cavite City ang place ko.
Wala kasi akong alam sa Electronic
Paki pm for sa suggestion.
Salamat

[JojoD818]

Sir,

The procedure for proper biasing should be in your User's Manual, it's pretty simple to do and no electronics skills is needed. As long as you are not color blind and can read numbers then we can teach you how. All you need is a DMM (digital multi-meter) and some philips screwdrivers.


HTH

[ATJr.]

Nga kapatid tulong naman.
Kailangan ko ng Profesinal tech para i-bias ang Cayin A88T, home service sana kung pwede.
Cavite City ang place ko.
Wala kasi akong alam sa Electronic
Paki pm for sa suggestion.
Salamat

if you are in Cavite, you can look for "audiomachines" he is a member of diyaudio.com

[bey]

Sir,

The procedure for proper biasing should be in your User's Manual, it's pretty simple to do and no electronics skills is needed. As long as you are not color blind and can read numbers then we can teach you how. All you need is a DMM (digital multi-meter) and some philips screwdrivers.


HTH

Sir,

No Biasing procedure on the manual that was provided to me by the seller. Besides I would not take the risk of hurting myself or do damage on the amp. Anyway thanks for the advice.

[bey]

if you are in Cavite, you can look for "audiomachines" he is a member of diyaudio.com

will contact "audiomachines" when I arrive home.
many thanks

[ATJr.]

^he is also a member at electronicslab.ph you may also try your luck there. i do not have his full contact details...

[Adam Warlock]

Nga kapatid tulong naman.
Kailangan ko ng Profesinal tech para i-bias ang Cayin A88T, home service sana kung pwede.
Cavite City ang place ko.
Wala kasi akong alam sa Electronic
Paki pm for sa suggestion.
Salamat

Please contact 395-5115 para sa step by step procedure sir. You need a multi-tester sir.

Cheers

[bey]

Please contact 395-5115 para sa step by step procedure sir. You need a multi-tester sir.

Cheers

Pag-uwi ko sir next month tatawagan ko yung number.
Sir Adam Warlock maraming salamat...

[Adam Warlock]

Pag-uwi ko sir next month tatawagan ko yung number.
Sir Adam Warlock maraming salamat...

We'll wait for your call

Cheers

[jomar]

I owned previously a A88T amp below are the biasing procedures. Please take note that the amp has HIGH voltages thus extra care should be taken.

1. Open bottom cover to have an access on the Test Point ( TP ) and Variable Trim pots (VR) .
2. Speakers should be connected and amp should be connected to your preamp but volume is turned fully down  ( NO signal applied to the amp ).
3. Turn-ON power amp for about 10 minutes to warm-up tubes.
4. Attached positive ( Red ) probe of DVM (Digital Volt Meter) to Test Point . Negative probe of DVM to GROUND.
4. Adjust the VR which corresponds to the tube being biased to get 0.4Volts (400mV) reading
    *** VR1 for V5 , VR2 for V6, VR3 for V7 and VR4 for V8 
5. Verify reading after 30 mins to finetune .
6. Power OFF amp and put back bottom cover

Sit back and enjoy the music

Hope this helps 

[bey]

Maramig salamat sir Jomar

[alexg]

Hi Bey,

I will bias it for you.

See you when you get home.

[bey]

Hi Bey,

I will bias it for you.

See you when you get home.

Thanks Alexg.

See you when I get home.

[bey]

Many thanks Alexg for biasing my A88t.