Dynacos get a new home

Hobbyguy
Hobbyguy Posts: 317
edited March 2009 in 2 Channel Audio
My new Dynaco 70 and PAS 3
Thanks Harry!
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  • engtaz
    engtaz Posts: 7,663
    edited February 2009
    Congrats. Those are sweet.
    engtaz

    I love how music can brighten up a bad day.
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  • leroyjr1
    leroyjr1 Posts: 8,785
    edited February 2009
    Hobbyguy wrote: »
    My new Dynaco 70 and PAS 3
    Thanks Harry!
    DSC_0229a.jpg

    DSC_0230a.jpg

    Looks like your addiction is growing
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  • beardog03
    beardog03 Posts: 5,550
    edited February 2009
    very nice !!
    Cary SLP-98L F1 DC Pre Amp (Jag Blue)
    Parasound HCA-3500
    Cary Audio V12 amp (Jag Red)
    Polk Audio Xm Reciever (Autographed by THE MAN Himself) :cool:
    Magnum Dynalab MD-102 Analog Tuna
    Jolida JD-100 CDP
    Polk Audio LSi9 Speaks (ebony)
    SVS PC-Ultra Sub
    AQ Bedrock Speaker Cables (Bi-Wired)
    MIT Shotgun S1 I/C`s
    AQ Black Thunder Sub Cables
    PS Audio Plus Power Cords
    Magnum Dynalab ST-2 FM Antenna
    Sanus Cherry wood Speak Stands
    Adona AV45CS3 / 3 Tier Rack (Black /Gold)

    :cool:
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  • LessisNevermore
    LessisNevermore Posts: 1,519
    edited February 2009
    Nice! I've got a friend with the same units.
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    Been looking at mods for dynaco....WOW! It's a hobbyguys delight.
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  • leroyjr1
    leroyjr1 Posts: 8,785
    edited February 2009
    Hobbyguy wrote: »
    Been looking at mods for dynaco....WOW! It's a hobbyguys delight.


    Which speakers are you running on this setup.
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  • Systems
    Systems Posts: 14,873
    edited February 2009
    Very nice, they look like near perfect specimens of those classics.
    Testing
    Testing
    Testing
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    LSi-15s
    DSC_0231a.jpg
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  • LessisNevermore
    LessisNevermore Posts: 1,519
    edited February 2009
    Very nice, just be careful. Those LSi's are a difficult drive.
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  • leroyjr1
    leroyjr1 Posts: 8,785
    edited February 2009
    Hobbyguy wrote: »
    LSi-15s
    DSC_0231a.jpg


    I thought for sure they were going on the SDA's or monitor 10's
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  • Ricardo
    Ricardo Posts: 10,636
    edited February 2009
    No source? ;)

    Nice grab.
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    My wavelength Brick should arrive tomorrow. For now just have my i-pod hooked up to pre-amp.

    Hmmmm....how do I be careful with my LSis? Can they be damaged with this set-up?
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  • HB27
    HB27 Posts: 1,518
    edited February 2009
    I'm glad you're enjoying it. I love the Dynaco ST-70 amps. They're without a doubt one of the most underrated amps. Their sound quality is fantastic with the right tubes in them. The XF2 Mullards can't be beat in them. The PAS match is a good one.
    Harry
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  • Face
    Face Posts: 14,340
    edited February 2009
    Nice setup! I wouldn't mind getting my hands on a Pas 3...I have a Pat 3 here and was thinking about gutting it and putting different guts inside. The stock unit leaves a lot to be desired.

    You should be ok driving those LSi's as long as you use the 4 ohm taps.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • capecodder
    capecodder Posts: 613
    edited February 2009
    Face wrote: »
    You should be ok driving those LSi's as long as you use the 4 ohm taps.

    I was wondering the same. I am also trying a ST-70 that I just bought, had cleaned up and re-capped. It is driving my CRS+ speakers using a vintage Marantz 7T preamp. It has two of the original Telefunkens and two "generic" tubes and so far I have been VERY impressed at the sound. I like it more than my monster NAD amp. However, I wasn't clear if I should run through the 8 or 4 ohms taps (am using the 8 ohms at the moment). Should I switch to the 4 ohms??
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    don't know if CRS are 4 or 8 ohm.
    My Pas 3 is all original except the power supply....was upgraded. Bought it on audiogon.
    http://www.audiogon.com/cgi-bin/cls.pl?preatube&1240576726
    Brian is a nice guy to deal with and nice to chat with.
    The pas 3 is the first preamp that I have ever had and I gotta say I'm hooked. I don't think that it is a purist preamp since it has lots of sound modifying buttons/knobs (loudness switch, Bass and tone controls) but I like contouring the music to my taste. The Bass is amazing!! This little amp/preamp and my Lsis shake the house. The only problem is that the bass is not as tight as I would like it...of course it could just be my cheap ipod recordings...cant wait to get my Brick to see.
    I have a lot to learn about the circuits and tubes and hopefully not too long before I'm rolling tubes.
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  • organ
    organ Posts: 4,969
    edited February 2009
    Awesome stuff. I also have an ST-70 and I will never sell that amp. It's so good.
    The reason you'd want to use the 4-ohm taps is because it will provide better damping for your LSi. I started with the LSi9 and ST-70 combo. However, you may lose some high frequencies by going to the 4 ohm taps.
    I'm sure you have a pair of RTi speakers. If you do, try connecting them to the ST-70. That combination is highly intoxicating. The RT series are much easier to drive and more tube friendly than the LSi.
    Enjoy your amp.
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  • capecodder
    capecodder Posts: 613
    edited February 2009
    Still wondering as per my post above. Should I also run my CRS+ speaks through the 4ohms taps of my ST-70??

    Thanks.
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    Are those 6 ohm speakers? Somebody correct me if I'm wrong but I think you should connect to the 4 ohm tap. I seem to recall that it is easier for your amp to drive a higher impedance speaker than a lower one.
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  • HB27
    HB27 Posts: 1,518
    edited February 2009
    Hobbyguy wrote: »
    don't know if CRS are 4 or 8 ohm.
    My Pas 3 is all original except the power supply....was upgraded. Bought it on audiogon.
    http://www.audiogon.com/cgi-bin/cls.pl?preatube&1240576726
    Brian is a nice guy to deal with and nice to chat with.
    The pas 3 is the first preamp that I have ever had and I gotta say I'm hooked. I don't think that it is a purist preamp since it has lots of sound modifying buttons/knobs (loudness switch, Bass and tone controls) but I like contouring the music to my taste. The Bass is amazing!! This little amp/preamp and my Lsis shake the house. The only problem is that the bass is not as tight as I would like it...of course it could just be my cheap ipod recordings...cant wait to get my Brick to see.
    I have a lot to learn about the circuits and tubes and hopefully not too long before I'm rolling tubes.
    Do all the rolling you like but leave the tubes in the ST-70 alone. You're not going to get a better sounding set of tubes than what's in there now.
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    Thanks for the advice Harry. Just saved me some money....
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    The Brick came today! I finally have my USB DAC. Haven't had time to really compare but so far it sounds REALLY nice. Incredibly easy to install.
    DSC_0234a.jpg
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  • organ
    organ Posts: 4,969
    edited February 2009
    Are those Mullard XF-2's in your Dynaco? If they are, you may want to get a quad of new production and save the life of your Mullards. Use them when you want to do some serious listening. Check ebay. You won't believe how much XF-2's go for.

    Many people have said that the new Gold Lion KT77 (direct EL34 replacement) is better sounding than the XF-2, but the XF-2 will always hold their value.

    What brand of rectifier and input tubes are you using? Sylvania 7199 are my favorite. Mullard GZ34 are probably the best.
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  • HB27
    HB27 Posts: 1,518
    edited February 2009
    The XF2 in that dynaco are close to 50 years old and still testing at new levels. Keep the bias just a hair under recommended and they'll last forever. As far as the new Gold Lions are concerned, they're not a bad re-issue but nothing close to the originals and are probably in reality being compared to EH, JJ, or some of the newer re-issues. I've got matching quads in a couple of my amps. They sound ok, but the XF2 is a heck of a lot better sounding tube.
    The recitifer is a JJ new. The sound isn't any different than the Mullard but won't take the abuse the Mullard will. Always follow the 5 minute rule and rectifier tubes hold up well.
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    Lot to learn about tube amps.....whats the 5 min rule (I probably have been breaking it)
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  • HB27
    HB27 Posts: 1,518
    edited February 2009
    when you turn it on wait 5 minutes before turning off. Wait another 5 minutes before turning back on
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  • HB27
    HB27 Posts: 1,518
    edited February 2009
    Hobbyguy wrote: »
    The Brick came today! I finally have my USB DAC. Haven't had time to really compare but so far it sounds REALLY nice. Incredibly easy to install.
    DSC_0234a.jpg
    I noticed in the pic of the brick you're running some "average" cables. You can vastly improve sound quality by running a better cable. Yours are very limiting.
    Not criticizing but suggesting.
    Harry
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  • Hobbyguy
    Hobbyguy Posts: 317
    edited February 2009
    aahhhh....at first it would look like average cable. The cable running from my brick to the preamp is an MIT AVt 1. The cable from my preamp to amp is an average cable. Bidding on a shotgun S3. Will replace it as soon as possible.
    Here is a question...all of the RCA posts on my preamp look like tin...would replacing these (the ones that I use) be a worthwhile upgrade?
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  • Face
    Face Posts: 14,340
    edited February 2009
    I wouldn't mix AVt and Shotgun cables. I had lackluster results mixing the two.

    Replacing the RCA's isn't a bad idea, you could use some deoxit on them instead.
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • organ
    organ Posts: 4,969
    edited February 2009
    HB27 wrote: »
    The XF2 in that dynaco are close to 50 years old and still testing at new levels. Keep the bias just a hair under recommended and they'll last forever. As far as the new Gold Lions are concerned, they're not a bad re-issue but nothing close to the originals and are probably in reality being compared to EH, JJ, or some of the newer re-issues. I've got matching quads in a couple of my amps. They sound ok, but the XF2 is a heck of a lot better sounding tube.
    The recitifer is a JJ new. The sound isn't any different than the Mullard but won't take the abuse the Mullard will. Always follow the 5 minute rule and rectifier tubes hold up well.

    Interesting. In my system, the JJ KT77 was many levels ahead of other current production. But I also love the Mullard re-issue, sounds very much like the SED with better bass and treble extension. But then again, I also love the EH EL34. Can be a little bright, but the overall tone is quite nice.
    Don't forget that you can also run 6L6 and KT66 in the ST-70. Mine sounded very good with Sovtek KT66. The 6L6 I tried is very mellow and dark. YOu'll lose output power but once in a while, it's nice to change the tone a little.
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