Radu’s Shiny Eyes 300B Amplifier
I am selling this excellent sounding 300B amplifier. It delivers clean 6.5 W into 4 or 8 ohms for a 1.65Vrms input sensitivity. The frequency response is 20Hz-20Khz @-0.4dB at 4W and the damping factor is 8. This higher Df is due to a 300B cathode feedback.
The amplifier uses power transformer Antek and Hammond chokes. The output transformers are from an Elekit kit. The high voltage power supply is using a CLCLC filtering and the last capacitor is a Mundorf HV+ 4 pins. Low voltage filaments are all regulated and provide soft start for 300B tubes. The high voltage uses 6CJ3 TV dampers as rectifiers. They have very fast and clean rectification and very appropriate for this design. No equivalents though.
The amplifier is a 2 stage one, a design that I find very rewarding in a cleaner sound. The driver is a Russian tetrode 6E5P in triode mode, and it is capacitor coupled to the 300B. The 6E5P is a powerful driver and very appropriate to use with a 300B.
All my builds are sturdy and meant to last forever. The parts used are high quality.
There is a delay circuit to avoid pops in the speaker. The amp is operational after 1 min when turned on.
The chassis is built in my traditional way using a top plate special order from Front Panel Express (engraved Anodized aluminum) and a genuine mahogany wood case.
I added a volume control for whoever want to use it as an integrated. Volume control is a Blue Velvet 50k Alps stereo.
The amplifier comes with all tubes except 300Bs.
The amplifier is very heavy at about 35 lbs. and measures 19”x14” (WXD).
I am open for offers. Parts and materials cost me about $1600.
I am selling this excellent sounding 300B amplifier. It delivers clean 6.5 W into 4 or 8 ohms for a 1.65Vrms input sensitivity. The frequency response is 20Hz-20Khz @-0.4dB at 4W and the damping factor is 8. This higher Df is due to a 300B cathode feedback.
The amplifier uses power transformer Antek and Hammond chokes. The output transformers are from an Elekit kit. The high voltage power supply is using a CLCLC filtering and the last capacitor is a Mundorf HV+ 4 pins. Low voltage filaments are all regulated and provide soft start for 300B tubes. The high voltage uses 6CJ3 TV dampers as rectifiers. They have very fast and clean rectification and very appropriate for this design. No equivalents though.
The amplifier is a 2 stage one, a design that I find very rewarding in a cleaner sound. The driver is a Russian tetrode 6E5P in triode mode, and it is capacitor coupled to the 300B. The 6E5P is a powerful driver and very appropriate to use with a 300B.
All my builds are sturdy and meant to last forever. The parts used are high quality.
There is a delay circuit to avoid pops in the speaker. The amp is operational after 1 min when turned on.
The chassis is built in my traditional way using a top plate special order from Front Panel Express (engraved Anodized aluminum) and a genuine mahogany wood case.
I added a volume control for whoever want to use it as an integrated. Volume control is a Blue Velvet 50k Alps stereo.
The amplifier comes with all tubes except 300Bs.
The amplifier is very heavy at about 35 lbs. and measures 19”x14” (WXD).
I am open for offers. Parts and materials cost me about $1600.
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Hi Radu, i wrote you on email regarding that pre-amp we were speaking about a few years ago. I've been away a long while because of personal troubles but now i'm very serious about it.
op mentioned in thread,
power transformer Antek and Hammond chokes. The output transformers are from an Elekit kit.
power transformer Antek and Hammond chokes. The output transformers are from an Elekit kit.