DYNACO Dyna Stereo 70, Installation Instructions Manual

 
INTRODUCTION 

Congratulations on your purchase of HiFi Hospitals’ Dyna Stereo 70 

original replacement PCB.  This kit has been designed with the “beginner” kit builder in mind, if 
at any point, this kit appears to be getting “too involved”, PLEASE, do not hesitate to call us. This 
kit has been designed to restore a Stereo 70 to its original, “factory new” (better than new) 
performance.  HiFi Hospital has taken special care in providing  a complete step-by-step 
comprehensive instruction manual to ensure proper assembly (#79-001-KIT) and installation of 
this PCB.  
 

DESCRIPTION 

HiFi Hospitals’ 79-001 original replacement PCB is a direct replacement 

for the original PC-3 PCB. This replacement PCB is superior to the original in all regards 
including fiberglass FR-4 construction; double sided plated through copper with solder mask and 
silkscreen.  Other components include ceramic tube sockets, Sprague ‘715’ series “Orange Drop” 
and silver mica capacitors, in addition, all one-watt resistors have been upgraded to 5% two-watt 
metal oxide resistors. 

 
INSPECTION 

Upon receiving your new kit, it is important that you identify and verify all 

parts have arrived, and are in good condition and have not been damaged during shipping.  
Included in this kit are one (1) #79-001 PCB with all components, one (1) instruction manual, and 
rosin core solder. Two (2) 7199 tubes and tool kit are optional and NOT supplied with the 
standard “#79-001” kit. 

 
REQUIRERD TOOLS/ GENERAL WIRING PRACTICES  

If you did not purchase the tool kit, you will need a few basic tools:  
 
#2 and #1 flat blade screwdrivers 
#2 and #1 Philips screwdrivers 
Wire strippers 
Sharp-nosed pliers 
25-watt soldering iron with standard tip. (DO NOT USE a SOLDER “GUN”!!)  
 
Wiring and soldering practices: 
If you feel uncomfortable or are unfamiliar with electronic soldering we highly recommend having 
a professional or qualified person install this kit.  HiFi Hospitals’ staff is also available to perform 
this service at an additional $50.00 shipping. 
 
 
 

DISASSEMBLY  

In the following steps “(   )” check off parenthesis are provided for the step-by-step disassembly.  

 
(   ) Remove the four (4) screws on both sides of chassis holding top and bottom covers to 
chassis.  
 
(   ) Remove all tubes. Place tubes in a safe location until final assembly. 
 

HiFi Hospital     Kit # 79-001  

Dyna Stereo 70 Original Replacement PCB