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Van Alsitne modified Dynaco ST-150

96.244.150.167
Posted on December 30, 2023 at 07:57:15
s.etal2@juno.com
Audiophile

Posts: 139
Location: Maryland
Joined: August 4, 2003
 I have a Van Alstine modified Dynaco ST-150. The only moving part is the power switch. It stopped working. Lucky for me it is stuck on the on position, so I am using a power strip to turn it off.
Does anyone know where I can find a replacement? Suggestions for substitute?
Thanks for your help.

 

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RE: Van Alsitne modified Dynaco ST-150, posted on December 30, 2023 at 11:15:46
6bq5
Audiophile

Posts: 4592
Location: SF Bay
Joined: August 16, 2001
 Any high quality DPDT switch rated for the current should work just fine-
if you want a cosmetic match - one that looks the same - it may be possible- but match the V & As first...
Happy Listening

 

RE: Van Alsitne modified Dynaco ST-150, posted on December 30, 2023 at 13:53:40
s.etal2@juno.com
Audiophile

Posts: 139
Location: Maryland
Joined: August 4, 2003
 Thanks for the information. I was hoping to match the switch as the slot in the front fascia is very narrow. Trying to keep away from having to modify the sheet metal. I guess I could get a toggle switch for the amp. but that would not be ideal.

 

RE: Van Alsitne modified Dynaco ST-150, posted on December 30, 2023 at 19:18:16
Pete B.
Audiophile

Posts: 72
Location: Central NJ
Joined: January 26, 2001
 Have you considered speaking with AVA? Frank may have a source.

 

RE: Van Alsitne modified Dynaco ST-150, posted on December 31, 2023 at 06:28:03
Scholl
Distributor or Rep

Posts: 1364
Joined: March 8, 2001
 If you can't find one I have a junk unit. I would want to get rid of the whole thing so shipping might be high. My price would be very low.

 

RE: Van Alsitne modified Dynaco ST-150, posted on December 31, 2023 at 07:24:42
petercapo
Audiophile

Posts: 665
Joined: December 29, 2012
 You might try contacting eBay sellers fantasiaaudio or vintagelectron.

 

+1, posted on December 31, 2023 at 07:52:55
E-Stat
Audiophile

Posts: 39092
Joined: May 12, 2000
Contributor
  Since: April 5, 2002
 When all else fails, ask the manufacturer!

 

RE: Van Alsitne modified Dynaco ST-150, posted on December 31, 2023 at 08:20:51
s.etal2@juno.com
Audiophile

Posts: 139
Location: Maryland
Joined: August 4, 2003
 The first thing I did was call AVA. They did not have any spares What is your price for the parts unit and how much shipping to 21136?
Thanks

 

RE: Van Alsitne modified Dynaco ST-150, posted on January 1, 2024 at 07:26:37
s.etal2@juno.com
Audiophile

Posts: 139
Location: Maryland
Joined: August 4, 2003
 How much would shipping be to 21136? How much do you want for amp.?
Thanks

 

RE: Van Alsitne modified Dynaco ST-150, posted on January 2, 2024 at 07:16:01
Scholl
Distributor or Rep

Posts: 1364
Joined: March 8, 2001
 I'll get back to you later today.

 

Peter!, posted on January 3, 2024 at 05:54:56
1973shovel
Audiophile

Posts: 10200
Location: Greenville SC
Joined: February 25, 2007
 Good to see you posting again!

 

RE: Peter!, posted on January 3, 2024 at 06:04:04
petercapo
Audiophile

Posts: 665
Joined: December 29, 2012
 Thank you. Hope you and all have been well.

 

hope you have been as well /nt, posted on January 3, 2024 at 06:07:55
Story
Audiophile

Posts: 11311
Location: NJ
Joined: December 11, 2000



 

Yes, thank you! (nt), posted on January 3, 2024 at 14:04:36
1973shovel
Audiophile

Posts: 10200
Location: Greenville SC
Joined: February 25, 2007

 

Dynaco ST-150 pictures, posted on January 4, 2024 at 11:20:07
Scholl
Distributor or Rep

Posts: 1364
Joined: March 8, 2001









Sorry for the delay. got caught up in a painting project.

This unit I built from a kit back in the mid 80s and ran it for a bunch of years then a friend blew it up. I then used the chassis for "Dick Smith" MOSFET modules and in the last few years ClassDaudio modules.

Let me know if this is the correct switch.

 

RE: Dynaco ST-150 pictures, posted on January 7, 2024 at 20:52:07
hahax@verizon.net
Audiophile

Posts: 4435
Location: New Jersey
Joined: March 22, 2006
 I built an ST150 in the mid 70s and eventually blew it up too playing with the power supply. But before that when I picked the amp up I asked about adding power supply capacitance and was told by Dynaco the more the better. When told you could squeeze 8 caps in I bought 6 caps and it worked for years. The 1st problem was the on off switch finally gave in probably due to the extra on surge of the extra caps.

 

RE: Dynaco ST-150 pictures, posted on January 8, 2024 at 14:19:52
JonM
Audiophile

Posts: 310
Joined: December 29, 2000



The slot for the power switch on the ST150 is narrow (as the OP mentioned above). This picture is from US Audio Mart, but looks like the ST150 I owned and used all through college. Any replacement switch will need to fit that slot.

 

RE: Dynaco ST-150 pictures, posted on January 9, 2024 at 05:45:37
Scholl
Distributor or Rep

Posts: 1364
Joined: March 8, 2001
 That's why I posted a picture of the power switch. Mine is the reissues from the 80s. Looks like the switch in mine won't work.

 

RE: Dynaco ST-150 pictures, posted on January 11, 2024 at 15:15:09
s.etal2@juno.com
Audiophile

Posts: 139
Location: Maryland
Joined: August 4, 2003
 Thanks for the picture. I have the narrow switch. At this point I am using the amp with a remote controlled switch.

 

Failed power switches, posted on January 13, 2024 at 09:17:26
M3 lover
Audiophile

Posts: 6687
Location: SW Mich
Joined: May 29, 2005
Contributor
  Since: July 4, 2007
 Many years ago a friend had the big Eagle 7 amp from John Iverson. That had such a large draw with turn on that no switch was included. Iverson recommended simply plugging and unplugging.

That could be a hassle so my friend installed a knife-switch in line and used that instead.

"The secret of life is honesty and fair dealing, if you can fake that you've got it made." Groucho

 

RE: Failed power switches, posted on January 13, 2024 at 09:21:20
coffee-phil
Audiophile

Posts: 1444
Location: Shingle Springs CA
Joined: January 7, 2010
 The power switch in my preamp switches a big AC relay in an electrical box which in turn switches my power amps.

Phil

 

A knife switch?? Right out of a Frankenstein movie! )MT(, posted on January 13, 2024 at 10:05:07
J. S. Bach
Audiophile

Posts: 9626
Location: Chester, SC
Joined: November 28, 2001
Contributor
  Since: June 29, 2004

Later Gator,
Dave
Find more about Weather in Chester, SC

 

A little smaller maybe, posted on January 14, 2024 at 06:32:35
M3 lover
Audiophile

Posts: 6687
Location: SW Mich
Joined: May 29, 2005
Contributor
  Since: July 4, 2007
 but yes. ;^)

"The secret of life is honesty and fair dealing, if you can fake that you've got it made." Groucho

 

Smiles. )MT(, posted on January 14, 2024 at 14:35:33
J. S. Bach
Audiophile

Posts: 9626
Location: Chester, SC
Joined: November 28, 2001
Contributor
  Since: June 29, 2004

Later Gator,
Dave
Find more about Weather in Chester, SC

 

have you tried..., posted on January 14, 2024 at 21:12:42
hifitommy
Audiophile

Posts: 15435
Location: canyon country califiornia, orig from buffalo ny
Joined: June 9, 2000
 Parts Express, Madisound, or MTM?
...regards...tr

 

Carling makes excellent switches with many styles and type that Will work., posted on February 13, 2024 at 04:41:22
Cleantimestream
Audiophile

Posts: 7581
Location: Kentucky
Joined: June 30, 2005
 !
The Mind has No Firewall~ U.S. Army War College.

 

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