A New Years Rats Nest
January 1, 2025
New P-P Amplifier for 2025
Electronics designers use many different prototyping methods. These days, it's very likely that a new design will never actually be prototyped but rather simulated using programs such as SPICE.For very simple circuits like tube amplifiers, I like the rats-nest method. It isn...
Guitar Amplifier Now Available for Order
September 25, 2023
The Red Roo Guitar Amplifier is Here.
The Red Roo Guitar Amplifier is now available for advanced purchase.Like all Red Roo amplifiers, it uses only top-quality components and is easy to build by anyone with a little electronic construction experience. It's a stand-alone "lunchbox" type amplifier so you will need...
SE5 - Noise and Distortion Sweeps
September 2, 2023
I've been playing around with the ARTA audio measurement software from https://artalabs.hr/ Although intended primarily for loudspeaker measurements, it does a very good job for tube amplifiers as well. I use this DAC https://focusrite.com/clarett-plusHere are...
More Power!
June 15, 2023
How Far Can I Push My SE5?
People have asked us how far can they push their SE5 amplifier, power-wise. As it turns out, quite a long way. By connecting a full-wave voltage-doubler circuit to the AC output from the power supply, it's possible to achieve much higher HT voltages. Using an HT vo...
Using Bookshelf Speakers?
May 27, 2023
Speaker Sensitivity, Amplifier Power, and Decibels
Here at RedRoo, we receive a lot of questions from people wondering how the SE5 amplifier will work with their small bookshelf speakers. That sounds like an easy question to generally answer YES, but, like anything in electronics, it depends on several factors:Speaker effici...
RedRoo PR5 Vinyl Preamp Now Available
September 21, 2022
The RedRoo Vinyl Preamp is now available, both as a full kitset or an information pack with PC boards for people who want to roll their own.I've had it playing for the last few months and it sounds great. This is a high-quality kitset which will rival preamplifiers many...
New RedRoo Guitar Amplifier
June 30, 2022
Here is a photo of the new RedRoo Guitar Amplifier, without its protective cover.
This is a top-shelf guitar amplifier with all the controls that a musician needs to create their own unique sound. The kitset is in the final stages and will be available soon.
For most o...
Here are first pictures of our prototype RIAA pre-amp that we were showing at the recent StereoNET Hi-Fi show in Melbourne. The preamp has either two switched moving-magnet phono inputs, or one moving-magnet and one moving-coil when fitted with Lundahl LL9226 step-up transfo...
StereoNET Hi-Fi Show in Melbourne 2022
May 19, 2022
Come see the RedRoo SE5 up close, and first glimpses of our new RIAA Preamp, at the StereoNet HIFi show in Melbourne. Look for us on the Vinyl and Valves stand.3rd-5th June 2022, Pullman Convention and Events Centre, Albert Park. https://www.stereonet.com/show......
Valve Supply Update
April 19, 2022
Electro-Harmonix, the makers of Tung-Sol, Electro-Harmonix, EH Gold, Genalex Gold Lion, Mullard, Svetlana & Sovtek valves, announced that they have found a way around import restrictions and can continue to supply, for now.
However, faced with mounting costs, they have ...
Loading...
Loading...