STK0050+ Pioneer SX-780 or marantz SR4000 replaces STK0050 STK0030 STK0040

Description

D
on't worry about the  quantity running low or out. I am making more.
Fully assembled and tested
with free USPS shipping
in the USA
Ready to use module replaces the Sanyo
STK0030 STK0040 STK0050 but more robust .
fits these models and probably a lot more
SX-780 SR4000 KR-5010 RS-2004A JA-S44 JCX-2050
NOTE! the  STK0030 STK0040 STK0050 family is smaller than the STK0060 STK0070 STK0080 family.
THE  STK0060 STK0070 STK0080  REPLACEMENT IS READY and LISTED
Compact design,  same mounting holes as the original Sanyo.
Just six solder connections, it takes a professional tech about 10 minutes to replace this module in a Pioneer
SX-780.
Typical current gain 8,000-20,000 vs original 5,000.
15 amp 160 volt transistors
INSTEAD OF THE ORIGINAL 5 AMP 110 VOLT PART
These same power transistors are used in the 140 watt per channel
Marantz SR8012
Denon AVR-X7200W and the Yamaha RX-A3070
NO bias adjustment, preset
during  testing
NO paste needed, we supply silpads
NO drilling or grinding to fit and only 4mm wider than the Sanyo
NOT
35 years old or counterfeit. Sanyo quit making these in 1983.
YES
Every module t
ested in our Pioneer SX-780
YES
gold plated PCB
PCB Finish, ENIG (
Gold
), compliant with IPC-4552.
YES
4 ohm speakers.
We use 15 amp outputs vs original Sanyo 5 amp devices
SX-780
Typical performance
into 8 ohms
with the  tone controls bypassed.
45
watt
1k
0.0039%
2
0k 0.0051%
4.5  watt    0.5k 0.0029%
1.0
watt
1k
0.0047%
20k 0.0177%
Performance into 4 ohms
88 watts     1k  0.0095%     20k 0.0290%
1 watt       1k  0.0036%     20k  0.0934%
Noise
-80 dBv
22-22k BW Audio Precision P1+DD test set
S/N
106
dB
22-22k
S/N
116
dB
A-wtd
New
: Assembled and tested in Pioneer SX-780 or Marantz SR 4000
Hand tools and simple solder skills required.
Technical knowledge required. No returns and limited support, this is not for beginners
We do supply instructions and helpful test tips.
More information at
the Pyramid-Audio  special projects web page ( if the web page is ever  done).
Check out the  latest news!
SP-40W+     ready, needs listing.  Pioneer SX-650
STK0050+    listed!   SX-780 SR4000 KR-5010 RS-2004A JA-S44 JCX-2050
STK0080+    listed!  Fisher
RS-2010
CA-880
CA-800  marantz SR6000
TA-100W+    listed!   Kenwood  KA-8300/7500/9800
TA-100WA+  listed!   Kenwood KA-9100/9150
TA-200W+    listed!
Kenwood KR-9600
NOTE
The TA100W and TA-100WA  are very  similar but  do not run at the right temperature
if swapped.