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The Dynaco Tube Audio Forum

Dedicated to the restoration and preservation of all original Dynaco tube audio equipment - Customer support for Tubes4hifi VTA tube amp and preamp kits and all Dynakitparts.com products


5 posters

    PA-060 Heatsink

    Sled108
    Sled108
    Sled108


    Posts : 40
    Join date : 2010-02-03
    • Post n°1

    PA-060 Heatsink Empty PA-060 Heatsink

    Post by Sled108 Fri Nov 05, 2010 9:39 pm

    Hey Bob...Do you see any merit in Strapping one of these to the back of a PA-060? I've done it, and it got Warm...Fast...And now it's 65 Deg. in here, but the PT is just warm to the touch at 2:00 on the Marantz 7T...It seems like a good idea to me..

    PA-060 Heatsink Pa-06012[/img]
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    Bob Latino
    Bob Latino
    Bob Latino
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    • Post n°2

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    Post by Bob Latino Sat Nov 06, 2010 12:28 pm

    Hi,

    Is that transformer cooler for real ? If so > Who makes it ?

    Bob
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    Sled108
    Sled108
    Sled108


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    • Post n°3

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    Post by Sled108 Sat Nov 06, 2010 8:30 pm

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    Sled108
    Sled108
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    • Post n°4

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    Post by Sled108 Sat Nov 06, 2010 8:47 pm

    This is how it works..



    PA-060 Heatsink Pa-06016
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    Sled108
    Sled108
    Sled108


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    • Post n°5

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    Post by Sled108 Sun Nov 21, 2010 12:15 am

    This really works...I've been running this a lot now thru 4 Bozaks at 6 Ohm/CH. and it sounds Great...The PT is Barely Warm, and the Edcors are cooler than that to the touch...
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    SUNNFRK
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    SUNNFRK


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    Join date : 2010-11-13
    • Post n°6

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    Post by SUNNFRK Sun Nov 21, 2010 6:20 pm

    Thats awesome. Ill have to give that a try. my PT has been getting very hot as well. I put a radioshack fan on top of it. it cools it down but I'm not thrilled with the white noise it generates. the PT on my MK3 also gets hot and stays hot after I turn it off.
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    Bob Latino
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    • Post n°7

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    Post by Bob Latino Sun Nov 21, 2010 6:44 pm

    Nearly all the original Dynaco PA-060 power transformers run hot. They only had a 1 1/2 to 1 5/8" stack. With limited iron, there was wasn't much metal in there to act as a heat sink to keep the transformer cool. NEW PA-060 upgraded replacement power transformers for the ST-70 all have a much higher stack, usually in the neighborhood of 2 to 2 1/2 inches. These will all run noticeably cooler than the stock power transformer. You won't need a "separate heat sink cooler" with any one of the upgraded PA-060 power transformers. The upgraded power transformers will also allow the use of 6550 and KT88 output tubes for a slightly different sound.

    Bob
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    Sled108
    Sled108
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    Post by Sled108 Fri Nov 26, 2010 11:21 pm

    Mmmm..Sounds like an Upgrade...Which 'New' PA-060's are you referring to Bob?
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    Bob Latino
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    • Post n°9

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    Post by Bob Latino Sat Nov 27, 2010 8:34 am

    Sled108 wrote:Mmmm..Sounds like an Upgrade...Which 'New' PA-060's are you referring to Bob?

    Sled,

    You can get upgraded power transformers for the ST-70 from Triode Electronics or Dynakitparts. I tend to like the one from Dynakitparts a little better. It costs a little less and it has a bottom cover. The Triode upgraded power transformer for the ST-70 has no bottom cover. You can buy one as a $5 "option" but IMHO they should give you the bottom cover. Without a bottom cover the transformer will undoubtedly release more EMI (electromagnetic interference) to the amp's circuitry. This *could* result in a noisier amp.

    Bob
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    Sled108
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    • Post n°10

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    Post by Sled108 Sun Nov 28, 2010 1:22 am

    Thanks Bob..I'll put the Dynakit PT on my list after I'm done with the 'Holiday Spending'...
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    Sled108
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    • Post n°11

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    Post by Sled108 Sat May 14, 2011 11:06 pm

    Hey Bob..Well, the Weather has gotten warmer, and so has my PT...Now, I'm trying this...Am I the only One who does this? I'm on Audiokarma and DiyAudio, but I have yet to see this done by Anyone...It would seem to be a really Cheap and Easy thing to help with a Hot PT...It Really works for me, and my ST-70...Maybe when July rolls around, I'll 'Borrow' my Mom's Digital Cooking Thermometer, and measure the Real Effect of the HeatSinks...


    PA-060 Heatsink 52686480
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    Bob Latino
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    • Post n°12

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    Post by Bob Latino Sun May 15, 2011 10:20 am

    Hi Sled,

    Maybe you could do a test with and without the heat sink and determine just how effective the heat sink is at dropping the temperature on your power transformer ?

    Bob
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    Westy56
    Westy56
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    Location : Albuquerque
    • Post n°13

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    Post by Westy56 Sun May 15, 2011 12:55 pm

    Sled108 wrote:Hey Bob..Well, the Weather has gotten warmer, and so has my PT...Now, I'm trying this...Am I the only One who does this?

    PA-060 Heatsink 52686480

    Hey Sled108, have you tried that on the sides of the PT? That area gets hotter than the top.

    I've wondered why companies didn't make transformer covers like motorcycle heads, heat fins everywhere


    Steve
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    quad
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    quad


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    • Post n°14

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    Post by quad Mon May 16, 2011 5:15 am

    Sled, any details on the driver board/circuit you have there?
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    Sled108
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    • Post n°15

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    Post by Sled108 Mon May 16, 2011 2:36 pm

    Bob; Yeah, I'll do a Temp Test when it gets even Warmer around Here...
    Steve; Yes, I still have the One on the Back in Post 4...
    Quad; No, I've been trying to find Details on that Board for the last 25 yrs.

    Cory..
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    Sled108
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    • Post n°16

    PA-060 Heatsink Empty Re: PA-060 Heatsink

    Post by Sled108 Tue May 24, 2011 10:40 pm

    Well, here's the Latest...Which I'll be doing a Temp Test with...But, now I've also Felt that the Choke is Quite Hot, even with the Fins on It...Maybe I'll have to find a Little Bitty Piped Cooler for it too...

    PA-060 Heatsink 53196968

    And, as You see It...Room Temp; 78 Deg...With an Old Fashion Candy Thermometer; 108 Deg. on the PT...At Moderate Listening Levels...Less then 12:00..
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    Westy56
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    • Post n°17

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    Post by Westy56 Wed May 25, 2011 9:35 am

    Sled108 wrote:Well, here's the Latest...Which I'll be doing a Temp Test with...But, now I've also Felt that the Choke is Quite Hot, even with the Fins on It...Maybe I'll have to find a Little Bitty Piped Cooler for it too...

    PA-060 Heatsink 53196968

    And, as You see It...Room Temp; 78 Deg...With an Old Fashion Candy Thermometer; 108 Deg. on the PT...At Moderate Listening Levels...Less then 12:00..

    Very nice. cheers


    Steve
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