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Happy Holidays! Triode Lab 45 EVO tube rolling, 2023 Writers' Choice Awards, and other stuff!

Greetings friends, and Happy Holidays to you! I hope you are all doing great this Holiday Season. 🙂 Here in the Pacific Northwest of the USA we've been inundated with rain from the atmospheric river that is dumping on us, with record levels of rain - estimated at 10 trillion gallons over the last week... Read More »

Tube swapping in the Audio Note (UK) Oto Phono SE Signature integrated amplifier!

If you've been keeping up with the posts here at Jeff's Place, you know I've been thoroughly enjoying listening to music with the combination of the Audio Note (UK) CD 2.1x/II Level Two Red Book CD player combined with the Audio Note (UK) Oto Phono SE Signature integrated amplifier. The combination of the Audio Note... Read More »

Today's Fresh Catch: The Sophia Electric Blue Glass KT88-ST Long Life Vacuum Tubes!

In my "Sexy Blue Tubes: The Sophia Electric EL34-ST and Aqua 274B Vacuum Tubes!" feature review article for Positive Feedback (HERE), I provided a brief history of the EL34 and 274B vacuum tube designs, and then described the various technical performance enhancements that Richard and Sue of Sophia Electric implemented in their flagship Sophia Electric EL34-ST... Read More »

Today's Fresh Catch: The Still Audio EL84 Integrated Amplifier!

As you know, I'm a big fan of EL84 integrated amplifiers, as they provide a live-like musicality that always seems to thrill me! So when Mark Still contacted me about writing up his hand-crafted Still Audio EL84 integrated amplifier here at Jeff's Place and for Positive Feedback, I was happy to say "Yes!". Adding to... Read More »

Today's Fresh Catch: The Vintage Fisher SA-100 Stereo Amplifier

Ron has a way of finding nice vintage audio treasures, and as a very talented tube tech Ron enjoys the process of freshening them up so they can be heard in all their glory. Ron brought along his latest project for the listening session with the First Watt SIT-3, the very interesting vintage Fisher SA-100... Read More »

GE 6L6GC vs. Tung-Sol 6L6GC STR: The Day the Music Died!

I decided to bite the bullet and order two matched pairs of the increasingly rare & expensive NOS GE 6L6GC's for my vintage MC30 monaural amps, so I could compare the fresh new GE's to the new production Tung-Sol 6L6GC STR's. I have found certain aspects of the Tung-Sol's musical & sonic performance to be... Read More »

Tung-Sol 6L6GC-STR Vacuum Tubes. Update.

My favorite power tube for my vintage McIntosh MC30 monaural amplifiers have been the gray plate GE 6L6GC's. The GE's provided a warm, rich, and naturally musical presentation that even the highly esteemed black plate RCA 6L6GC's had to bow down to. For my hot-rodded MC30's the GE's take musicality to another level, but they... Read More »

Prototype deHavilland Super 40 and the NOS Tung-Sol 5AW4 Rectifiers

Kara Chaffee (deHavilland Electric Amplifier Company) was over visiting Pete Riggle (Pete Riggle Audio Engineering) for an impromptu audio fest, and brought along her prototype Super 40 monaural power amplifiers for a little listening. I didn't have a camera along with me so I didn't get any photos of the Super 40 prototypes (sorry about... Read More »

The 14th Annual Positive Feedback Writers' Choice Awards for 2017!

The 14th Annual Positive Feedback Writers' Choice Awards for 2017 are now live here. Actually the Writers' Choice Awards went live a few days ago but this is my first chance to tell you about it. Here's a preview of my little contribution for 2017. You can read the fully story at the link. ¸¸.•*¨*•♫♪... Read More »

The Sophia Electric EL34-ST and Aqua 274B Vacuum Tubes Review is Now Live at Positive Feedback!

I wrote all day yesterday and finished up the review of the Sophia Electric EL34-ST and Aqua 274B vacuum tubes. The Sophia Electric EL34-ST power tubes (above) and Aqua 274B rectifiers (below) outperformed everything that's ever graced my Leben CS-600 integrated amplifier, and vintage McIntosh MC30 monaural amplifiers, respectively, and by a large margin. I don't... Read More »

Sneak Preview: The Sophia Electric EL34-ST and Aqua 274B Vacuum Tubes Article for Positive Feedback!

I'm hard at work listening and writing this weekend for my article about the Sophia Electric EL34-ST and Aqua 274B vacuum tubes for Positive Feedback. I hope to be finished up with the article either this or next weekend, but I thought in the meantime you might enjoy a sneak peek, so here you go! ¸¸.•*¨*•♫♪¸¸.•*¨*•♫♪¸¸.•*¨*•♫♪... Read More »

A Western Electric Film About Vacuum Tubes!

Everyone loves Western Electric it seems, and for good reason, as their vacuum tubes and audio designs are the stuff of legend! I just ran across a fun film (below) from Western Electric about their vacuum tubes that was in the AT&T Archives, and I thought I'd share it with you. Enjoy! A Modern Aladdin's... Read More »

Jeff checking in ... Duelund DCA, FryBaby2, Sophia Electric, and more!

Using the Hagerman Audio Labs FryBaby2 in voltage-only mode has revealed itself to be a powerful voicing tool for the Duelund DCA line of tinned-copper cables. Every single time I've used the FryBaby2 on the Duelund cables it has been a smashing success. In its voltage-only conditioning mode the FB2 has worked wonders on my... Read More »

Jeff checking in ...

It sure was nice getting together with Andy, Pete, and Ron, last weekend to listen to music, talk about hifi, and just have a fun ol' time! I could use a little more musical & audio fellowship in my life! Alas, it's been particularly busy of late, both on the day job, and in my... Read More »

The New Sophia Electric EL34-ST Vacuum Tubes in the Leben CS600 Integrated Amplifier!

It's been far too long since I've done some tube rolling, so I was delighted to hear from Sue & Richard at Sophia Electric that they wanted me to give their new Sophia Electric EL34-ST vacuum tubes a review for Positive Feedback. I'm a real pushover for the ST bottle shape, I just love the way... Read More »

Jeff checking in ... Lefson review is done, Duelund DCA20GA, and a look forward through the crystal ball!

It has been a busy audio weekend, and I'm trying to get caught back up after Jeff's Place going down due to the hacking event last week. The good news is that you've encouraged me to keep going with Jeff's Place for the foreseeable future. I was pretty discouraged after the hacking event, but with all... Read More »

Today's Fresh Catch: Sophia Electric EL34-ST & Aqua 274B Vacuum Tubes!

I get really excited about vacuum tubes! When Sue and Richard at Sophia Electric contacted me about doing an article about their new Sophia Electricâ„¢ EL34-ST vacuum tubes I was quite intrigued. I don't know what it is, but every time I see a vacuum tube with the 'ST' style of glass bulb shape I just swoon, I... Read More »

Cool video on how Mullard made vacuum tubes - enjoy!

I ran across this fascinating video out on YouTube on how Mullard vacuum tubes were made, circa 1950's. Very impressive. Enjoy!

An Akihabara Audio Adventure: Gary Bronner's Visit to Sun Audio in Tokyo

While Gary Bronner and I were discussing the upcoming A5 'Voice of the Theatre' project, he was telling me about his recent visit to Sun Audio in Tokyo. It sounded like such a fun trip I asked Gary if it would be ok to share it with all of you, as I thought you'd all enjoy... Read More »

Adventures in Real Sound with Mr. Shirokazu Yazaki is now live at Positive Feedback!

I finished up my Adventures in Real Sound with Mr. Shirokazu Yazaki article yesterday, and it is now live at Positive Feedback here. It has been an immense pleasure for me to get to know Yazaki-san and to tell you about him, and his ideas & recommendations for 'Real Sound' have made a wonderful difference in my hi-fi.... Read More »

Yazaki-san checking in ... DA30 DH-SET monaural amplfiers!

I just heard from Yazaki-san, and he sent me some photographs of the DA30 SET monaural amplifiers he made for his friend Ookubo-san, and they're so beautiful I wanted to share them with you! The DA30 SET monaural amplifiers Yazaki-san made for his Ookubo-san are based on using the vintage Western Electric 310A as the driver, a vintage... Read More »

The British Fineness of Tone: Haltron 5U4G and Mullard ECC83

If you read my Kindred Spirit post, you'll remember that as Mr. Yazaki-san was discussing the 'capacitor adventure' we are doing with my vintage McIntosh MC30 monaural amplifiers, he said: "Well, I think my inspirations also come from confidence in the thought that, Jeff-san’s hearing sense would be very close to mine. I understand Jeff-san... Read More »

Siedy Checking In From The Netherlands: Chaos!

It's always a pleasure to hear from Siedy in the Netherlands. If you've been following along the conversations here at Jeff's Place you'll recognize Siedy as the gentleman responsible for me becoming aware of the powerful and musical ASR Emitter II Exclusive Version Blue amplifier that was developed by Mr.Friedrich Schaefer in Germany. Siedy used the... Read More »

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