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Sovtek 5AR4 – Upscale Audio
https://upscaleaudio.com/products/sovtek-5ar4
Sovtek 5AR4 Attention! Before buying any 5AR4, 5U4, GZ33, or GZ37, here is a hot ticket from Uncle Kevvy: Buy the Philips 5R4GYS made in Holland. Click here for info. Very rare. We got a stash of them and they are incredible. The only thing …
PrimaLuna 5AR4 – Upscale Audio
https://upscaleaudio.com/collections/vacuum-tubes/products/primaluna-5ar4
PrimaLuna 5AR4 ATTENTION! Due to supply chain issues, we cannot offer complete re-tubes with PrimaLuna-branded tubes at this time.If you own a PrimaLuna amplifier and need help with replacing a single faulty tube, give us a …
Gold Lion U77 / 5AR4 New Production Rectifier – Upscale Audio
https://upscaleaudio.com/products/gold-lion-u77-5ar4-new-production-rectifier
Upscale Audio 2058 Wright Avenue La Verne, California 91750 (909) 931-9686. DEMOS & SALES BY APPOINTMENT ONLY Monday-Friday 8:30am - 5:30pm Pacific
Mullard New Production GZ34 / 5AR4 Rectifier – Upscale Audio
https://upscaleaudio.com/products/mullard-new-production-gz34-5ar4-rectifier
Mullard GZ34 / 5AR4 - New production made in Russia. This tube is well-built, sounds great, and has been a great rectifier for folks looking to break free from the typicak Sovtek or Shuguang offerings. Please do not buy this thinking it's going to sound like a NOS Mullard... it won't. But... it's also a fraction of the
Philips 5R4GYS 5AR4/5U4G, Dutch, New from Upscale Audio ...
https://www.audiogon.com/listings/lisa70j3-philips-5r4gys-5ar4-5u4g-dutch-new-from-upscale-audio-tubes
The best buy and best made 5AR4/5U4G that we have or ever had. Made in Holland, where the famous Amperex Bugle Boy tubes were made. First-rate, absolutely stunning tubes. Like the 5U4G, these are a bit taller, and a little bigger in circumference than a typical 5AR4. They require 5 inches of clearance from the tube socket base to the top of the tube.
Favorite 5AR4 Rectifier? | What's Best Audio and Video ...
https://www.whatsbestforum.com/threads/favorite-5ar4-rectifier.23612/
There is at least one Web page with some comparative rankings, and like so many NOS tubes it may all come down to how much you want to spend. My favorites in the under $200 range are late '50's - early '60's Mullard GZ34 and the Philips 5R4GYS that appears to be exclusive to Upscale Audio at this time.
5AR4 rectifier tubes - forum.audiogon.com
https://forum.audiogon.com/discussions/5ar4-rectifier-tubes-chinese-or-russian
I'm needing to replace 2 - 5AR4 rectifier tubes in my Primaluna Prologue 3 preamp. Kevin at Upscale Audio has both the Sovtek and Shuguang tubes for $15 bucks each. The next step up is the Japanese tube at $45 each. The tubes I'm replacing are original so I assume they are the Chinese model and I haven't tried rolling in any others.
Rectifier tubes, the hidden "sweetness" of electronic gear ...
https://forums.stevehoffman.tv/threads/rectifier-tubes-the-hidden-sweetness-of-electronic-gear-vintage-and-new-guitar-amps-and-stereo.356600/page-11
The unfortunate thing is, everything Upscale and others say about the Philips 5R4GYS sound is true. It is the best sounding rectifier I have ever heard. The bass performance is incredible. But I worry about the stress it puts on my other tubes, and I have opted to go with a Mullard GZ34 metal base in my amp as a result.
mullard 12ax7 platinum grade - swedinoxmanufacturing.com
https://swedinoxmanufacturing.com/xutf/mullard-12ax7-platinum-grade.html
mullard 12ax7 platinum grade January 20, 2022 January 20, 2022 January 20, 2022 January 20, 2022
5R4GYS tube - positive-feedback.com
https://positive-feedback.com/Issue68/5R4GYS.htm
Hot Review: The NOS Philips 5R4GYS Rectifier Tube (Replaces GZ34/5AR4) - Bargain Priced! Awesome Sound! by Robert H. Levi. This 1960's made tube developed for rugged video application has been found in quantity by Upscale Audio, in Upland, CA. Kevin Deal searches the world for new old stock tubes hidden in the wildest places, and he struck gold here!
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