Amplifier on tubes "Bachelor"

You are correct.

Although I am not sure the difference between 6Z1P and 6ZH1P. Why the H is is there in the middle I don't know. Like are they the same tube possibly?

 

Using http://tdsl.duncanamps.com/tubesearch.php I plugged the tubes into the search (I used the English language equivalents). The Bachelor tube (found in this thread post #4) is a 7 pin https://tinyurl.com/y2nkgzj6, and the SW51+ is a 9 pin https://tinyurl.com/y5shr95d.

 

These are the same tube. The Russian \ Cyrillic designation for this russian tube is 6Ж1П.

6 = filament voltage in volts, rounded off
Ж = sharp cutoff pentode
1 = series
П = small 9-pin or 7-pin glass envelope

Ж is variously translated to latin as zh, sh or j. П is usually translated as P. So, different manufactures could print 6ZH1P, 6SH1P, or 6J1P and they'd be the same.

It looks like the tube is also referred to as 631П on duncanamps, which can translate to 6Z1P, but the '3' doesnt make sense in the russian coding.

 

I found this article a while back about the tube used in the Bachelor which may or may not be useful for some:

https://audiofool.reviews/tube-rolling-the-xduoo-ta-02-and-ta-05-amplifiers/

The Bachelor is definitely a 7 pin out.

 

?????? What front loading tubes? I should have added this quote to my above post, that is why I added the links to the data and pin out.

 

Good call out. There I go again mixing up the ZDT Jr. with the SW51.

What I meant to say is, "For those with this amp, they are Russain 6Z1P tubes, same as the front loading tubes of the ZDT Jr."

Fixed.

 

Nailed it. I give the Asgard 3 a small but real lead in resolve and (interestingly enough) stage and instrument separation there in. That said I have as of yet only listened to the stock tubes and I will have to order these 5654W's

 

I have lucky number 007 of that amp. Zampotech has included a different volume knob on my request - free of charge - which I like very much. Also I award a special bonus point for the LED colour being tastefully matched to the tube colour while not being too bright. Having 2 Schiit LEDs and 2 Digione LEDs illuminating my bedroom at night already is certainly enough.

I need to do more listening before posting something conclusive here. But I want to share something on the HD600 that I am typically using: I have seen calculations on sensitivity and on how much power is needed to achieve satisfying listening levels. IMHO this is not the true/full story with the HD600. As others have posted before this headphone likes to have its balls in a vice, and the amount of power required for that is a different story.

So question for the Bachelor will probably be what it needs to drive.

 

My Bachelor Amp arrived many weeks ago but due to the events of the time (funeral) it remained boxed. Swapped the Bachelor in for SW51+ in the Towering Delight. Here is the picture with the loaner Bachelor Amp. Different knob on my unit; I like it. Will have to take a picture when I'm really back from post funeral stuff.

@ChaChaRealSmooth posted a really good description above. Stock 6Z1P are a little too zippy for me. Put the GE5654w in and not looking back. Bachelor, Modius and HD6x0 make for an excellent small footprint workstation system with one potential flaw. It is easy to get sucked into music, distracting from productivity. Better have some mental chewing gum music playing low if productivity is important. One advantage is the combination makes for a highly transportable system fitting neatly in a backpack.

I think of the Bachelor as the MG B sports car of amplifiers. Not the fastest or best handling but an exceptionally fun drive. Many hours of enjoyment to be had.

 

What kind of power output can we expect from the Bachelor? I'm using efficient planars(70ohm/101db) and wondering how much I'd be pushing the amp with this load.

 

The answer to your question may be found here

The rest of the measurements may be found here:
https://www.superbestaudiofriends.org/index.php?threads/the-bachelor-technical-measurements.9496/

 

So after listening to this amp for quite awhile, I almost decided to get rid of it. I decided I need to try it with more headphones and roll some different tubes. I am glad I did both.

Over time, the loss of detail and bloom on the bottom end really started to rub me the wrong way on HD650s. Sure, it gave some heft to the low end of the 650's, but it is mostly fine there. I kept feeling like I was loosing details on the top end. It still had a deep soundstage, just not sounding "quick." Not nearly the bloom of a Darkvoice 336SE or a Crack, but it was certainly on the darker side of things.

First, I picked up some RCA 6AK5's. This gave some more air, but not enough. But wow, even more depth. Getting closer. Sound was not night and day, and super subtle. I even switched back right away and was like, "okay", maybe just a slight gain. (fitting, because I have misplaced one of the stock tubes)

Finally got my Denon AH-D2000's in order with replacement drivers. Holy crap...these are perfect with this amp. Wide, deep, air. I would say it is still light on the slam department, but this is working! Went back to the Vali 2 - smaller stage and depth, more etchy upper mids. It was quicker, but just did not have magical tube qualities. Made the Vali 2 sound more like a SS amp.

So with high efficiency lower impedance dynamics, this is a real winner. High impedance might have some more bloomy lows and may not have as much gain as one may like. It certainly is not a powerhouse, but man is it a super non-fatiguing sound.