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Any experience with EZ-80s, 5687s or Bendix 6900s?

I have an AMR CDP and it uses EZ-80s as rectifiers and 5687s in the output stage. I may have a problem with a rectifier tube and was thinking of replacing it (them). I know nothing about EZ-80s (or EZ-81s). The current rectifier is an NOS Philips. Does anyone here know what a Telefunken EZ-80 might sound like in this application or how it might compare to the Philips?

Also, I have heard that some people are using Bendix 6900s in place of the 5687 Tunsgarams. Same questions here if you have any input.

Thanks,

Frank
fmpnd

Showing 5 responses by fmpnd

fmpnd's avatar
fmpnd OP
481 posts
 
Sorry, I mixed these tubes up in my original post. The Phillips are the 5687s and the Tungsrams are the EZ-80s.
fmpnd's avatar
fmpnd OP
481 posts
 
Thanks Kgproperties! You and I must have similar tastes. Your description of the Tungsram sound is exactly what I told Darren yesterday. I reviewed the original version of the AMR for Stereo Times and just had Darren send me the .01 update (with Tungsrams). I still have both players.

I am having a hard time finding the RFT EZ-80s. I have a friend loaning me some Telefunken EZ-80s and Bendix 6900s to try. It sounds like the RFTs may be what I am looking for from your description. Do you have any sources for the RFT EZ80s?

Regards,

Frank
fmpnd's avatar
fmpnd OP
481 posts
 
Hifiharv,

Here is what I learned about the EZ81 as a drop-in for the EZ80. The EZ81q is pin-compatible but draws nearly twice the heater current (1.0A vs. 0.6A). I am not sure if the transformers in the AMR have enough capacity to take the EZ81 but I will try to find out.
fmpnd's avatar
fmpnd OP
481 posts
 
Thanks Kgproperties. I just bought the RFTs from him and they shipped yesterday. I also found an NOS set of Bendix Gold pin 6900s from a dealer and bought them. I'll keep you posted. I hope I get the same great results you did.!! ENJOY!
fmpnd's avatar
fmpnd OP
481 posts
 
Glory, I've been away for quite a while and just happened to be researching tubes for my AMR again and saw your post. The Bendix were wonderful for a couple of months and then just crapped out on me.

I do not know if I was purposely sold old or defective tubes at the time (even though they were represented to me as NOS) or not. However, based upon subsequent dealings with that same dealer. I now consider him to be fundamentally dishonest.

Thus, I am now not sure if the tubes I had were representative of what an NOS Bendix really has to offer.

I am now open to suggestion as the AMR distributor screwed my player up when he upgraded it by taking out my double crown chip and never replacing it . Between that and the tube issues, I have never been able to get the real magic back with my AMR that it used to have. I now use it mainly for headphones and have since gone back to my Reimyo as my main CDP.

Regards,

Frank
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