SV-P1616D/VK Pentode Power-amplifier
Hashimoto version HW-40-5 kit 120V/240V
NO Volume Pot
Point to Point assembly
Kit or assembled version are available in Early December
The production version will get rid of the volume port and replace the stock opt to Hashimoto H40-5
You will notice that the output transformer has been replaced by Hashimoto HW-40.
All aeesembled version be will instaled with 4X Vcap ODAM coupling caps
The original output transformer is a custom-made product (made in Japan) optimized for the SV-P1616D and has KNF (cathode NF) windings, but the OPT to be installed this time does not have KNF windings. NFB is established based on the delicate balance of the amplifier, so the design is very delicate and design changes are required.
According to the report of the craftsman who was commissioned to make the prototype, the default NF resistor and phase compensation capacitor capacitance caused oscillation outside the audible range. This is something that cannot be detected by ear and can only be detected by measurement, so special care is required. As a result, integral compensation was added to the secondary side of the OPT to ensure stability and the project was completed.
I accept preorder
Hashimoto version HW-40-5 kit 120V/240V
NO Volume Pot
Point to Point assembly
Kit or assembled version are available in Early December
The production version will get rid of the volume port and replace the stock opt to Hashimoto H40-5
You will notice that the output transformer has been replaced by Hashimoto HW-40.
All aeesembled version be will instaled with 4X Vcap ODAM coupling caps
PRE-ORDER Pricing
KIT $2,150 (point to point kit)
Assembled $2,750 (Made and Assembled in Japan with 4 VCAPs ODAM)
TUBE SET EXTRA
It would be premature to think that anyone can just change the OPT... The output transformer affects the overall characteristics as much as a car engine. In cases such as a single triode with no feedback, it may be possible to replace it by checking the impedance and core capacity, but in the case of a push-pull amplifier with a large amount of feedback, in the worst case scenario, the amplifier may oscillate and be damaged, so careful consideration in advance and detailed measurements after replacement are required.The original output transformer is a custom-made product (made in Japan) optimized for the SV-P1616D and has KNF (cathode NF) windings, but the OPT to be installed this time does not have KNF windings. NFB is established based on the delicate balance of the amplifier, so the design is very delicate and design changes are required.
According to the report of the craftsman who was commissioned to make the prototype, the default NF resistor and phase compensation capacitor capacitance caused oscillation outside the audible range. This is something that cannot be detected by ear and can only be detected by measurement, so special care is required. As a result, integral compensation was added to the secondary side of the OPT to ensure stability and the project was completed.
I accept preorder
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Hi what's the output power? Do it have 4ohm speaker output? I am looking for a powerful push-pull amp to Gamut RS7, they are 4ohms.
