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    survey - what project now ?

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    tubes4hifi
    Admin

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    Join date : 2008-11-30

    survey - what project now ?

    Post by tubes4hifi on Thu Sep 09, 2010 9:16 pm

    I was trying to post this as a POLL but it doesn't seem to be working, so go ahead and respond with your replies as posts

    VOTE for your 1st and 2nd choice on a future project from this list . . . .
    1* low cost 17wpc EL84 tube amp
    2* high power 120w monoblocks with quad KT88s
    3* low cost line stage preamp
    4* medium grade line stage preamp with TONE CONTROLs
    5* premium grade line stage preamp
    6* premium grade phono stage
    7* completely new PAS3 preamp with new chassis design

    Blitzen

    Posts : 47
    Join date : 2009-07-10

    Re: survey - what project now ?

    Post by Blitzen on Thu Sep 09, 2010 9:19 pm

    4,5, then 7.

    Captain Coconut

    Posts : 213
    Join date : 2009-10-13
    Age : 64
    Location : Great White North

    Re: survey - what project now ?

    Post by Captain Coconut on Thu Sep 09, 2010 10:40 pm

    1 and 6 especially if the phono stage (6) had a volume pot so it could be run directly to 1 for a nice simple analog system.

    JunkyJan

    Posts : 103
    Join date : 2008-12-09
    Location : BC, Canada

    Re: survey - what project now ?

    Post by JunkyJan on Fri Sep 10, 2010 12:17 am

    In order of preference:

    1) 3
    2) 5
    3) 6

    (Heck, why not do 3 AND 5?)

    ...and what stops me from putting option 2 (High-power 120 Watt monoblocks) in first place, is the cost involved in populating the tube sockets (I am currently working on a pair of Mark III monoblocks - and getting lots of flak from my Minister of Finance regarding the cost of 4 Gold Lion KT88... I'd be sleeping in the doghouse until 2020 if I doubled that!)

    -- 'Jan
    BC, Canada

    GP49

    Posts : 733
    Join date : 2009-04-30
    Location : East of the sun and west of the moon

    Re: survey - what project now ?

    Post by GP49 on Fri Sep 10, 2010 1:02 am

    6, 1

    baddog1946

    Posts : 304
    Join date : 2010-02-03
    Location : Costa Rica

    Re: survey - what project now ?

    Post by baddog1946 on Fri Sep 10, 2010 10:36 am


    I think #1 and #2 with stepped attenuators would be the call for guys like me that use a PC based archive for my music library. My preamp/EQ is the PC. Then directly to a DAC and into the amp. Simple and clean. I only use my "Bottlehead" Foreplay for what III Extended preamp for hooking my tuner and I-pod to the system.Its the amps for me.
    Depends on what Bob decides is the price for the high power amp but these are tough times and cost is a biggie for almost everyone. A 35 watter could be very reasonable and in kit form very affordable.



    Seems like a lot of people are storing and playing stuff from a PC based HDD these days. L
    ess space on the shelf and once burned you can re-sell those CD's. A terabyte HDD is only $100 these days and that's a lot of CD's

    Kits would help that situation but a high quality 35 watt amp has enough kick for most efficient speaker setups.
    A layout that would allow direct hookup wherever possible would not only simplify thungs but is a good way to get a quality signal path.
    Hope our Tbues4 hifi gurus come up with something we can get into for reasonable costs.
    Good luck gentlemen.

    PeterCapo

    Posts : 386
    Join date : 2008-12-05

    Re: survey - what project now ?

    Post by PeterCapo on Fri Sep 10, 2010 1:31 pm


    High power 120W+ monoblocks with quad KT88s (and dual 5AR4 tube rectifiers, please).

    Premium grade line stage preamp (in an attractive, possibly retro-looking chassis, with all the tubes sticking up, out of the top)

    ViperZ

    Posts : 21
    Join date : 2010-03-26

    Re: survey - what project now ?

    Post by ViperZ on Sat Sep 11, 2010 12:14 am

    I'd say try good quality phono stage and high power amp.

    Btw, preamps are the most difficult to build, so I'd steer clear of those. Smile

    natoe

    Posts : 34
    Join date : 2010-03-06
    Location : Pittsburgh, PA

    Re: survey - what project now ?

    Post by natoe on Sat Sep 11, 2010 8:13 am

    I would like to see 1 and 2. Just in kit form so you can buy what you want and do your own chassis.I know some people just need the basics to the amp everthing else I have on the shelf it would keep the cost down for me. I would do #2 on one big chassis so not to have two seprate items. I have some really good ideas for lay out and material other than stainless and aluminum with no seems or spot welds.

    viridian

    Posts : 14
    Join date : 2010-02-19

    Re: survey - what project now ?

    Post by viridian on Mon Sep 13, 2010 3:47 pm

    6, oh 6 definitely. Then 3 and finally 1.

    Tube Nube

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    Age : 53
    Location : Calgary, AB

    Re: survey - what project now ?

    Post by Tube Nube on Mon Sep 13, 2010 4:19 pm

    6.

    tubes4hifi
    Admin

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    Join date : 2008-11-30

    next question on premium phono stage

    Post by tubes4hifi on Tue Sep 14, 2010 2:06 am

    great feedback, keep it coming everyone! Very Happy 4 or 5 votes is all it will take for these projects to come to you,
    I've got most of these projects 3/4 done but on the back burner
    while I'm building 3 fully modified PAS3 preamps for a customer (does anyone else want $900 mods?)
    So far the clear favorite is premium phono stage,
    followed by low cost stereo amp and high power monoblock.
    Roy has a low cost stereo amp coming in a month or so, Bob has the high power monoblock coming.
    So the next question regarding a premium phono stage, what's the preference of these two . . .
    A - Aikido style with 4 tube (12AX7) gain stage, passive EQ, and 4 tube gain stage
    B - super low-noise JFET pair cascoded into 2 tubes (6922 or 12AX7),
    passive EQ, and Aikido 4 tube gain stage
    option B should give better performance for less cost and less heat (IMO)

    Keep voting on the survey, and add your vote for the option A or B premium phono stage.
    And somebody tell me how you can vote for 3 and 5,
    did you mean to say 5 and 6 ??

    viridian

    Posts : 14
    Join date : 2010-02-19

    Re: survey - what project now ?

    Post by viridian on Tue Sep 14, 2010 11:19 am

    Yuck, neither. How about octal tubes, 6SL7 maybe, and a choke power supply with 5V4 or 5Y3? Outboard power supply, active EQ. Why not make a product that differentiates itself from the me-too designs currently on the market and has some tone?

    tubes4hifi
    Admin

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    Re: survey - what project now ?

    Post by tubes4hifi on Tue Sep 14, 2010 2:59 pm

    octal - sure, no problem. Choke power supply, definitely, But active EQ, no way, it's more complicated, more expensive, and doesn't work as well, as tubes wear the EQ changes
    Are you mentioning tube tone, or tone controls? I've got both !!

    RichJB603

    Posts : 14
    Join date : 2010-05-10

    Re: survey - what project now ?

    Post by RichJB603 on Tue Sep 14, 2010 4:05 pm

    2, 4, 5, 7 in that order. That doesn't mean I will buy one of each as soon as they are out, but definetly something I would take a serious look at if they were available.

    viridian

    Posts : 14
    Join date : 2010-02-19

    Re: survey - what project now ?

    Post by viridian on Tue Sep 14, 2010 6:28 pm

    Tube tone, not tone controls. And thanks for always being so open. I will buy one no matter what you decide on.

    bigmm79

    Posts : 23
    Join date : 2010-09-15

    Re: survey - what project now ?

    Post by bigmm79 on Wed Sep 15, 2010 4:06 pm

    3, 4 and/or 5 - something cool looking with tubes visible.

    PeterCapo

    Posts : 386
    Join date : 2008-12-05

    Re: survey - what project now ?

    Post by PeterCapo on Wed Sep 15, 2010 5:11 pm

    Absolutely. Don't keep the tubes hidden. The more tubes the better. WAY cool.

    DesignInc

    Posts : 10
    Join date : 2010-08-31
    Age : 61
    Location : Central Coast, Calif

    Re: survey - what project now ?

    Post by DesignInc on Wed Sep 15, 2010 7:54 pm

    6B - "super low-noise JFET pair cascoded into 2 tubes (6922 or 12AX7),
    passive EQ, and Aikido 4 tube gain stage, option B should give better performance for less cost and less heat (IMO)"
    Ya I just dug out my old B&O 2402 table and the vinyl timewarp "Introducing ... the Beatles" - Jeff Beck "Blow by Blow" - "The Jimi Hendrix Experience" Allman Brothers "Eat a Peach" what a trip.

    David

    xlr8

    Posts : 68
    Join date : 2010-02-09

    Re: survey - what project now ?

    Post by xlr8 on Wed Sep 15, 2010 10:51 pm

    I'd be interested in #6.

    Tube Nube

    Posts : 641
    Join date : 2008-12-06
    Age : 53
    Location : Calgary, AB

    Re: survey - what project now ?

    Post by Tube Nube on Thu Sep 16, 2010 12:40 pm

    6 options?

    JFET? That's a transistor, ain't it?

    My preference is for non-hybrid, all tube design.

    But if it's better than the Phono in the VTA pre amp I'm about to start building, and better than the Transcendent Phono I've already got, I'll buy it anyway.

    Newportcycle

    Posts : 19
    Join date : 2010-09-29
    Location : Central Maine

    Re: survey - what project now ?

    Post by Newportcycle on Thu Sep 30, 2010 7:33 pm

    2 and 5 for me, please.

    tubes4hifi
    Admin

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    Join date : 2008-11-30

    survey and projects update

    Post by tubes4hifi on Mon Oct 04, 2010 9:00 pm

    OK, looks like this survey has run it's course for now.
    Here's an update on what I've got available now, and what I will have later . . . .
    none of this stuff is on my website yet so if interested just email me directly, it should be on my website by the end of this week (10-10-10)
    info@tubes4hifi.com
    1 - low cost EL84 tube amp ** this is done, to save cost uses my VTA70 driver PCB, so all 4 tubes can be individually biased. Uses EDCOR transformers, very good quality about $100 less than Dyna clones. 5AR4 rectifier, choke in power supply, and adjustable bias on all 4 output tubes.
    12" x 10" steel chassis with custom top plate to mount all components.
    Full kit $450, partial kit also available.
    2 - high power monoblocks ** Bob is working on these and maybe available in a month.
    3 - low cost line stage preamp ** I have all the parts available to clone a PAS3, with or without phono stage, uses a nice 12" x 12" aluminum chassis, custom front panel available, full kit $375 for line amp.
    Also available with your choice of premium line or phono PCBs, or a premium tone control line amp.
    4 - medium grade preamp with tone controls ** done, similar to #3, full kit $450 with a premium power supply section, phono section $80 add-on.
    5 - premium grade line stage preamp ** done, similar to #3 but with premium PCB design & components based on AIKIDO design, full kit $450
    6 - premium grade phono only preamp ** I'm working on 2 versions, one is all tube and based on a quad of 6C45pi tubes (those are $100 themselves) and a pair of 12AX7s in mu-follower output with passive RIAA EQ, similar to another $1000 preamp. Full kit $450 with tubes!!
    Second version I should have done by end of October, with JFET current source for super low-noise cascode front end, followed by passive EQ, followed by AIKIDO style output stage. Full kit $500 with tubes!!! This should easily compare to $3000 phono only preamps from ARC and CJ etc.
    7 - see #3, with phono, line, and power supply, full kit total $450

    For more info on any of this, contact me directly at info@tubes4hifi.com

    t8ter

    Posts : 10
    Join date : 2010-01-03
    Location : Calgary, Alberta

    Re: survey - what project now ?

    Post by t8ter on Sat Oct 23, 2010 9:28 am

    2,6

    Falcon4646

    Posts : 9
    Join date : 2010-02-21

    Re: survey - what project now ?

    Post by Falcon4646 on Sat Oct 23, 2010 10:55 am

    1 - low cost EL84 tube amp ** this is done, to save cost uses my VTA70 driver PCB, so all 4 tubes can be individually biased. Uses EDCOR transformers, very good quality about $100 less than Dyna clones. 5AR4 rectifier, choke in power supply, and adjustable bias on all 4 output tubes.
    12" x 10" steel chassis with custom top plate to mount all components.
    Full kit $450, partial kit also available.
    2 - high power monoblocks ** Bob is working on these and maybe available in a month.
    3 - low cost line stage preamp ** I have all the parts available to clone a PAS3, with or without phono stage, uses a nice 12" x 12" aluminum chassis, custom front panel available, full kit $375 for line amp.
    Also available with your choice of premium line or phono PCBs, or a premium tone control line amp.
    4 - medium grade preamp with tone controls ** done, similar to #3, full kit $450 with a premium power supply section, phono section $80 add-on.
    5 - premium grade line stage preamp ** done, similar to #3 but with premium PCB design & components based on AIKIDO design, full kit $450
    6 - premium grade phono only preamp ** I'm working on 2 versions, one is all tube and based on a quad of 6C45pi tubes (those are $100 themselves) and a pair of 12AX7s in mu-follower output with passive RIAA EQ, similar to another $1000 preamp. Full kit $450 with tubes!!
    Second version I should have done by end of October, with JFET current source for super low-noise cascode front end, followed by passive EQ, followed by AIKIDO style output stage. Full kit $500 with tubes!!! This should easily compare to $3000 phono only preamps from ARC and CJ etc.
    7 - see #3, with phono, line, and power supply, full kit total $450

    My vote:

    4/6 enhanced combo with both phono/line stage being premium, with tone controls for these old ears, and maybe JFET front end.

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