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Bendix 6106 vs 5Y3GT

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Posted on January 12, 2017 at 18:46:11
thetubeguy1954
Audiophile

Posts: 6112
Location: Orlando, Fla
Joined: January 7, 2001
 Guys as most of you already now I've been involved in audio for over 50 years, but I don't have the slightest clue on the technical aspect of audio. I was recently perusing the internet and came across as statement about a tube that I just don't understand! So I'm hoping one of the more technically astute amongst you will explain this in a way I can understand, ok?

Here goes. The site stated that the Bendix 6106 CANNOT sub for a 5Y3GT in many power supplies due to it's VERY slow filament/cathode warm-up time of 30-45 seconds. So contact your equipment manufacturer before subbing a 6106 for a 5Y3GT.

My question is why would the very slow filament/cathode warm-up time of 30-45 seconds hurt or in any other way affect the power supply provided that you didn't attempt to use the amp, preamp or whatever before 30 to 45 seconds passed? Is it probable that you'll damage your audio component using this tube in your power supply? Would you chance it? TIA for you time and answers...
Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers


 

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RE: Bendix 6106 vs 5Y3GT, posted on January 12, 2017 at 19:38:05
sony6060
Audiophile

Posts: 1465
Location: USA
Joined: August 8, 2014
 I do not find any issue on warm up time. Like a guitar amp turned on with the standby switch in standby and then switch on the B+ even an hour later causes no damage.

 

RE: Bendix 6106 vs 5Y3GT, posted on January 12, 2017 at 22:21:25
FenderLover
 Been using either slow start-up 6106 or 6087 rectifiers in all of my 5y3GT amps. No problems. Very reliable tubes.

 

RE: Bendix 6106 vs 5Y3GT, posted on January 13, 2017 at 00:41:58
Frihed89
Audiophile

Posts: 15703
Location: Copenhagen
Joined: March 21, 2005
 Same here. No worries.

 

Thanks To All Who Responded, posted on January 13, 2017 at 11:12:25
thetubeguy1954
Audiophile

Posts: 6112
Location: Orlando, Fla
Joined: January 7, 2001
 I genuinely appreciate your input. As I no nothing about the technical aspect of audio, I got nervous about using the Bendix 6106 after reading Tube Worlds that " the Bendix 6106 CANNOT sub for a 5Y3GT in many power supplies due to it's VERY slow filament/cathode warm-up time of 30-45 seconds. So contact your equipment manufacturer before subbing a 6106 for a 5Y3GT."

I also received a reply from the manufacturer of my audio component today and he agreed with what you all said. His comments while short and to-the-point were: "Slow warm up is fine. It is not a problem." It seems great minds do think alike! Thanks again to you all. You took a BIG load off of my mind, that the manufacturer completed by placing his cherry on top of your replies!

I'm listening to: Feel The Rhythm by Daria







Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers


 

RE: Bendix 6106 vs 5Y3GT, posted on January 13, 2017 at 23:20:11
DAK
Audiophile

Posts: 2712
Location: PACIFIC
Joined: August 8, 2010
 I ran across that statement about not using the 6106 because of the slow warm up in another forum and thought that it was made by someone who was either inexperienced or more likely covering their butt about some equipment of theirs. I think that some users of the 6106 thought that their tube was defective because of the slow warm up. The belief that the slow voltage ramp up for the 6106 is detrimental to their equipment seems to indicate a lack of knowledge of basic tube fundamentals. I use a pair of them in the power supply of a dual chassis amp for powerering a SE Kt120 amp.

 

RE: Bendix 6106 vs 5Y3GT, posted on January 14, 2017 at 07:43:14
Steve O
Audiophile

Posts: 12381
Location: SE MI
Joined: September 6, 2001
 There is at least one relatively uncommon app where slow warmup would be disastrous: where both B+ and negative bias rectifiers are tubes, esp if B+ rectifier is DH. I've seen this primarily in really old high high power stuff like transmitters and PA booster amps. One notable high quality audio amp employing 5Y3s in the bias circuit was the Mac MI200.

So, while the caveat regarding slow warmup may seem excessively CYA, it's warranted IMO.

 

Thanks DAK & Steve O, posted on January 17, 2017 at 14:29:03
thetubeguy1954
Audiophile

Posts: 6112
Location: Orlando, Fla
Joined: January 7, 2001
 I appreciate your added input.


I'm listening to: Feel The Rhythm by Daria






Thetubeguy1954 (Tom)

Central Florida Audio Society -- SETriodes Group -- Space Coast Audio Society
Full-range/Wide-range Drivers --- Front & Back-Loaded Horns --- High Sensitivity Speakers


 

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