Preamp Deal of the Century

Just bought another Mullard gz34 instead.
I truly hope it is better than the one I have at the moment,
which must be a dud as it makes the Syrah sound terrible.
I suffered it for a few days thinking it must come better but could not bear it and put the Sovtek 5ar4 back in.
I will keep an eye out for a bendix.
Thanks again.
Simon

You are into something here. Although the Mullards are great in my Chenin (Metal GZ34), you have to remember that when Mick listened to the preamp, especially the phono, the parameters were adjusted with the conventional tubes in service.

For example, the right resistance to properly biased the JFET's etc. If you open the preamp, you will see that there are rheostat's (blue) on some junctions that their primary fuction was to "tweaked" or "optimized" a certain parameter(s) (i.e. voltage or current)to voiced out the preamp.

...just a thought...

I tried a GZ37 in my Syrah and did not like it at all. I experienced the same thing Fiddler did. My favorite rectfiers are Bendix 6106, Metal base GZ34, and Tung Sol 5Y3 (I know it will shorten the life of the other tubes). When I use it, I take David's advice and put in a GZ34 to warm up the pre and then turn it off, switch to the 5Y3 and turn it right back on so that the other tubes are already warmed up. I only do this on weekends when I will leave the pre on all weekend. There is something magical about the sound of that Tung Sol 5Y3. I will try the Mazda 5Y3 soon.

Hi all,
thanks Slowhand for the pointer re the Bendix.
What I'm confused about is the 6106/5Y3WGT directly heated, like the Tungsol or is it indirectly heated ala the Mazda ?
Sorry for being thick but I'm new to tubes and really don't want to go pulling them in & out all the time.
I'm amazed that the rectifier makes such a difference - any other pres I've had were untroubled as long as the rectifier was functional but the line stage tubes made readily obvious differences to the sound.
Thanks Simon

Hello Simon74,

The Bendix 6106 in indirectly heated.

You guys may think I'm nuts, but I just recently purchased a low-noise pair of EH 6SN7's to try on a lark. One of my '52 Syl "Bad Boys" that I had in place was spitting (it cleared up fortunately).

I have another pair of '52 Syls and two pair of Ken Rads, plus a pair of Tung Sol Round Plates on the way, but I was just curious about the EH 6SN7's.

Well, after about 30 hours of burn-in, I swear, I think they are better than the '52 Syls or the Ken Rads (at least in my system). Excellent, tight bass, liquid mid-range and extened, grain-free highs and very detailed.

I was expecting them to have sub-par bass and to be somewhat etched with grainy highs. Wrong on all counts.

I remember a long time ago, soon after I got my Supratek, I posted an opinion that the rectifier and the regulators have a much greater affect on the sound than the 6SN7's. I am still convinced of that.

I think the EH's are better than the '52 Syls or the Ken Rads, but only slightly so. I have to listen really critically to determine a difference. Time will tell about the Tung Sols, but I know I won't be buying anymore NOS 6SN7's for my Supratek any time soon.

You guys can all jump in and tell me I am crazy now, but that's the way I hear it.