Best M8080 NOS tube for CJ preamp line stage?


Starting to get into some tube research, having recently replaced the tubes in my CJ pre-amp. I am still using the stock M8080 for the line stage, but am interested in upgrading with a pair of matched NOS, maybe Mullard or RCA. Suggestions?
sabocat59

Showing 3 responses by jeffreybehr

The Mullard M8080 that c-j sells is New Old Stock. A few years ago, soon after I bought my MET-1, the 6-channel preamp that uses M8080s, I bought a BUNCH of different 6C4s/6135s. Virtually all the 6C4s were highly microfonic and so bad I tossed them in the trash. I understand that the 6135 is a heavy-duty version of the 6C4, and the few I found, maybe a half-dozen, are not microfonic and sound plenty OK; I use them in the surround and SW channels. I use only the M8080s in the front-3 channels and have had NO problems with them. I have a trio that I removed from the front-3 channels after about a thousand hours that are just lying about; if you want them, they're yours for $15 Priority Mailed to you in the US. E-mail me at jeffreybehr(at)cox(dot)net if you're interested.

I hope you enjoy your c-j preamp; I sure love mine.
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Billimbriale, no, you didn't miss it. I suggested years ago to c-j that they include that info; apparently they're still not.

Looking at the face of the unit, the front row, left to right, is LF, RF, LR, RR. Rear row is C and SW, left-to-right.

You have one? And enjoy its sound? I LOVE mine, and it sounds even better after I replaced the front-L/R channels' coupling caps* with SoniCap Platinums (Teflon-film) and the PS small-bypasses** with Platinums and Jupiter HTs. E-mail me (address in 4th post above) if you'd like pics.

* Originally, large 'propylenes bypassed with small 'styrenes
** Originally small 'styrenes.
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Watford's "6C4/CV4058 MUL/BOX ANODE" is 15 Pounds plus shipping. Any c-j lovers up for a group buy? MAYBE the price could be lower, and shipping cost per piece surely should be lower. I'd go for maybe a halfdozen. Contact me at jeffreybehr(at)cox(dot)net if you're interested.
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