Hi there,

I mostly built custom amps and preamps to the customer specifications.

However, once in a while, I have equipment for sale and here is where I will post them.

Thank you for your interest in my designs!

Best wishes,

Radu from a Simple Pleasure Audio place

1. An integrated 45 amplifier with Electra-Print partial silver secondary output transformers SOLD!!!

Here is the description of the amp: https://simplepleasuretubeamps.com/shiny-eyes-integrated-dht-45-set-amplifier/.

SOLD

*********************************************************************************************************

2. SET EL34 amplifier with Hashimoto output transformers SOLD!

Shiny Eyes EL34-6SN7 SET Single Ended Amplifier Triode and UL by Radu Tarta@2025

Here is another variation of a very good sounding EL34 amplifier using Hashimoto output transformers. This is a single ended, triode or ultra linear switchable and self-biased amplifier. Just plug and play, and enjoy a very musical device. The predominant second harmonic makes this amp very close to a DHT SET sound. The max power output is 4W (8 ohms load) in triode mode. It is 8W in UL mode. This makes it useful for a variety of speakers with sensitivity over 90 db.

The amplifier uses the very well-known 6SN7 as drivers. They are wired with triodes in parallel and loaded on active CCS loads. They are capacitor coupled to the EL34, using red Arizona caps.

The power supply has very large toroidal transformer (400VA, Antek) and uses a 5AR4/GZ34 rectifier.

All components are high quality and audio grade. The amp is built to last.

The amplifier is built on a very sturdy chassis by Landfall systems, 1/8” aluminum all the way. The front and sides are dark Peruvian walnut.

Specifications

Triode mode: Gain 13dB, Input impedance 100k, and input sensitivity 1.23Vrms for 4W max output on 8ohms. 

UL mode: Gain 17dB, Input impedance 100k, and input sensitivity 1.18Vrms for 8W max output on 8ohms. 

The amplifier will work with EL34, 6CA7 and KT77. 6L6 is not an option.

The amplifier measures 18x14x9” (WxDxH) and weighs about 42 lbs.

*********************************************************************************************************

3. Shiny Eyes SET 300B amplifier with Electra-Print output transformers SOLD!!!

This is my latest build of the 300B SET amps. It uses 300B power tubes and the 6E5P powerful driver. The output transformers are the low IMD Electra-Print. The amp is transformer coupled early Western electric style with modern electronics support. The interstage transformers are the LL1671/30mA from Lundahl, Sweden. The audio path is well thought and all components are of high quality: Cardas BP and RCA, Mundorf, Elna Cerafine, Obbligato caps, Takman, Mundorf, Vishay MILspec resistors

The power supply section was designed with a lot of care to have the least impact to the quality of the sound. Each 300B filament has its own regulated supply, the driver filament is DC regulated, and the high voltage supply has plenty of reserve and has a very low ripple, using the 6CJ3 tube rectifiers and a CLCLC filter.

There are two Hoyt USA front panel analog meters that show the plate current of each 300B and should measure around 60mA.

The amp is built in a very sturdy aluminum chassis from Dave at Landfallsystems, with front and sides wrapped in Peruvian walnut. The top plate is CNCed at Front Panel Express. The amp dimensions are 19x14x9 (WXDXH), and weigh about 51 lbs.

Selling for $6,000 plus shipping. The price is firm and includes all tubes, except the 300Bs.

This amp is a very good choice for whomever is looking for a 8W SET DHT amp using one of the most praised direct heated triodes of all times.

The input sensitivity is 2 Vrms for full power output.  The speaker output is optimal for 8 ohms. The amplifier was built to last, and tested and broken in for 50 hours.

4. SET 6C33 monoblocks amplifier with Noguchi output transformers

It’s been a while since I wanted to design and build an SET using the famous 6C33 triode. I also liked the idea of having a “winter amp.” It will warm up the room during cold and snowy winter days.

Why monoblocks in this case? I chose to build monoblocks to have better heat management control considering the 6C33 heat dissipation. In addition, this choice allowed me to maximize the performance of the amplifier, and extent the life of the 6C33 and its sockets.

The power supply is made of several blocks:

High voltage for the power tube. This uses an Antek 200VA toroidal power transformer, Sic diode rectified and CLCLC filtered using two, screw terminal, 1000uF/500V capacitors.
High voltage for the driver and gain stage using a separate 30VA power transformer.
Raw negative supply and Coleman fixed bias regulator.
DC regulated supply for the 6SN7 filament.
The signal circuit uses a 6SN7 and 6C33. The first triode of the 6SN7 is a gain stage and the second triode is the driver. They are capacitor coupled to the 6C33, and a -7.5dB GNFB is applied for controlling the distortion and damping factor.

The power triode is loaded on a Noguchi output transformer for an exquisite sound. The triode has a mixed bias using partially self-bias and partially fixed bias. There is a multi-turn precision potentiometer. A 500mA Hoyt USA panel meter helps adjust the anode current to 200mA. The fixed bias is supply by a Coleman bias regulator known for its excellent performance.

There is a 135 seconds delay on applying the high voltage to 6C33. That is a necessary practice to protect the power triode from early failure.

All components in the signal path are of high audio quality. The binding posts and RCA are made by Cardas.

The amplifier was broken in and tested for at least 48 hours.

Specifications are as follows:

Main Voltage: 120Vac 60 Hz, Power draw: 115W per monoblock

Main fuse: 3A SB, Anode current fuse: 300mA SB

Max output power 12W

Input sensitivity 0.8Vrms, Input impedance 47kohms

Frequency response: -1dB 20Hz-40kHz

THD: 0.8% at 2 W, 2% at 10W

Damping factor: 5

Size: 14x18x11 (WxDxH), and 35 lbs

Selling for $7,000 plus shipping. The price is firm and includes all tubes