preamp suitable for Dynaco st-70- OTHER than dynaco

namatjira · 28th March 2008, 12:43 AM

Can anyone advise a suitable OPTION to the matched preamps from Dynaco. Specifically for the ST-70 amp. Lots advise the use of the Dynaco units but these are getting hard to come by.

Eli Duttman · 28th March 2008, 01:05 AM

What are you using as the signal source(s)? If all you use is a CDP, a passive level control mounted CLOSE to the ST70 may be sufficient.

As long as you keep the wiring between the volume control and the amp very short and low capacitance, you are probably safe in using a 50 KOhm part. A stock ST-70 has a 470 KOhm resistor at its I/P.

kstagger · 28th March 2008, 12:10 PM

no reason to run the Dynaco PAS when there are plenty of other preamps out there.

Personally I find a stock PAS highly colored (in a pleasant way). You can dump plenty of money into one to bring it up reasonable performance levels, but at that point you may be better off just building something DIY. DIY preamps are some of the cheapest things to build out there (provided you don't go crazy!).

mr2racer · 22nd December 2011, 01:21 AM

Namatjira,

I agree with Eli, and I think if your CD player has a remote and a volume control would you need a preamp at all? Eli could probably answer that question better than I.

And here's an option if you aren't handy with building chassis. Buy a Dynaco PAT 4 or 5 off eBay. You can pick them up cheap. Then buy a set of PAS 3 boards and a power transformer and Voila! Tube preamp. I did just that and the man in Wisconsin who has it now loves it. See attached photos

Kevin

28th March 2008, 12:43 AM	#1
namatjira diyAudio Member Join Date: Mar 2008	preamp suitable for Dynaco st-70- OTHER than dynaco Can anyone advise a suitable OPTION to the matched preamps from Dynaco. Specifically for the ST-70 amp. Lots advise the use of the Dynaco units but these are getting hard to come by.

28th March 2008, 01:05 AM	#2
Eli Duttman diyAudio Member Join Date: Apr 2004 Location: Plainsboro, NJ	What are you using as the signal source(s)? If all you use is a CDP, a passive level control mounted CLOSE to the ST70 may be sufficient. As long as you keep the wiring between the volume control and the amp very short and low capacitance, you are probably safe in using a 50 KOhm part. A stock ST-70 has a 470 KOhm resistor at its I/P. __________________ Eli D.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Dynaco ST-410 Amp	Creelove	Solid State	7	22nd July 2010 05:08 AM
Dynaco PAS Preamp Tone Controls	Justin_122	Tubes / Valves	0	7th October 2007 04:32 AM
DIY Preamp for use with Dynaco ST70	liggs17	Tubes / Valves	3	7th December 2006 06:46 PM
Dynaco PAS 3 preamp	woodturner-fran	Swap Meet	0	1st December 2006 10:21 PM
Dynaco preamp rebuild	Don Nebel	Solid State	9	11th September 2006 01:48 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

28th March 2008, 12:10 PM	#3
kstagger diyAudio Member Join Date: Dec 2003 Location: Grand Rapids	no reason to run the Dynaco PAS when there are plenty of other preamps out there. Personally I find a stock PAS highly colored (in a pleasant way). You can dump plenty of money into one to bring it up reasonable performance levels, but at that point you may be better off just building something DIY. DIY preamps are some of the cheapest things to build out there (provided you don't go crazy!).

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)