Hello,
I am planning to build the HA-5000. Now I can order the pcb from the famous Chinese websites, but I'm looking for the complete schematic. On the internet I do find schematics of the amplifier board itself, but not of the power supply and overvoltage protection. Hopefully someone of you has the complete schematic and possibly the parts list available.
Thanks in Advance
I am planning to build the HA-5000. Now I can order the pcb from the famous Chinese websites, but I'm looking for the complete schematic. On the internet I do find schematics of the amplifier board itself, but not of the power supply and overvoltage protection. Hopefully someone of you has the complete schematic and possibly the parts list available.
Thanks in Advance
I have seen many "basic" signal circuit sketches of the Audio-Technica AT-HA5000 headphone amplifier, but not a complete schematic.
AT-HA5000 - diyAudio
Can you share what you found?
AT-HA5000 - diyAudio
Can you share what you found?
Thanks for your reply.
I found also this schematic;
It is a little bit more detailed than the schematic in you link.
I found also this schematic;
It is a little bit more detailed than the schematic in you link.
Thank you for sharing your find. It would be nice if we have the actual Audio Technica service manual.
Ebay seller usually does not share the schematic of their kit.
Assembeld Class A FET headphone amp board base on HA5000 with ALPS pot L163-88 | eBay
Ebay seller usually does not share the schematic of their kit.
Assembeld Class A FET headphone amp board base on HA5000 with ALPS pot L163-88 | eBay
For example:
NIEUWE Sep_store ZEROZONE HA5K Headohone versterker kit clone HA5000 amp Circuit in NIEUWE Sep_store ZEROZONE HA5K Headohone versterker kit clone HA5000 amp Circuit van Versterker op AliExpress.com | Alibaba Groep
HA5K Headphone power amplifier (clone HA5000 amp Circuit) bare PCB-in Headphone Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
NIEUWE Sep_store ZEROZONE HA5K Headohone versterker kit clone HA5000 amp Circuit in NIEUWE Sep_store ZEROZONE HA5K Headohone versterker kit clone HA5000 amp Circuit van Versterker op AliExpress.com | Alibaba Groep
HA5K Headphone power amplifier (clone HA5000 amp Circuit) bare PCB-in Headphone Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
The English version for those who needs them.
NEW Sep_store ZEROZONE HA5K Headohone amplifier kit clone HA5000 amp Circuit-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
NEW Sep_store ZEROZONE HA5K Headohone amplifier PCB clone HA5000 amp Circuit-in Amplifier from Consumer Electronics on Aliexpress.com | Alibaba Group
One step further in the process. I found en check the protection and relay circuit. Unfortunately without values, but it is possible to identify by the color codes of resistors.
I have just made a rough draft of the schematic. I have drawn these from the PCB board. Unfortunately without capacitor values. Note, I'm not sure yet if this 100% is correct, but it is a start.
I like to hear your thoughts.
I like to hear your thoughts.
I bought the kit. When I received it, I will share my experience
Just found some extra information:
Just found some extra information:
I received 0.22 ohm / 5W emitter resistors instead of 0.1 ohm. Is this a problem? For the current through the FET?
I have also another question, there are 3 different Silver Mica capacitors in the diagram. Namely 15pF, 27pF and 6pF. But I have received 16pF, 30pF and 5pF. Are these differences noticeable / audible? This also applies to some resistances. As an example I should have 24ohm but have received 22ohm. This also applies to some other values. Is it worthwhile to still order the right values or are these differences too negligible?
I am very eager to see your full evaluation of the kit and assessment of the finished headphone amplifier. Looking at the PCB and layout, it seems to me to be a clone of the Shanling PH100 which was a clone of the Technica HA5K. The PH100 has long been out of production. The seller also sells the complete package finished for $334.I have also another question, there are 3 different Silver Mica capacitors in the diagram. Namely 15pF, 27pF and 6pF. But I have received 16pF, 30pF and 5pF. Are these differences noticeable / audible? This also applies to some resistances. As an example I should have 24ohm but have received 22ohm. This also applies to some other values. Is it worthwhile to still order the right values or are these differences too negligible?
Aliexpress.com : Buy GZLOZONE Finished Clone AT HA5000 Class A Headphone Amplifier from Reliable class a headphone amplifier suppliers on sep_store
This GZLOZONE looks more true to the schematic in the second post. From a quick glance they have 3 trim pots, while the Breeze Audio clone has only 2. Which I am still not sure how to optimize.
The 1K pot in the middle is to set the bias. Set it to the point so there is 200mA true the 0.1ohm resistor.