Message to Katie Wasserman: thanks!



#4

Through the valuable article by Katie I was able to resurrect an HP-27. Thanks to a small resistor 32 kOhm, this little beauty can fully be together with other woodstock in the collection of an avid collector.
Many thanks again and regards from Italy.

Ignazio


#5

Please share with us Katie's work.


#6

Of course, hpnut.
I was trying to repair the hp-27 of my dear friend. No display but good tensions from the DC-DC inverter and a current drain of 110 mA.
How you can read in the article of Katie about the issues of Woodstock's series calculator, I have cut the SYNC trace from the ACT to the rest of the calculator and insert one resistor (32KOhm, 1/4W, 5%) that has resurrected the little beauty, so far. My first attempt has been with a 20 KOhm resistor but with value of resistor the 27 needed 3 or 4 minuts to warm up properly.
It's all, I'll be available for any further information.

Regards from Italy.

Ignazio


Possibly Related Threads...
Thread Author Replies Views Last Post
  Formatting the app view message with bullets (dots) Geoff Quickfall 4 213 10-14-2013, 06:22 PM
Last Post: Geoff Quickfall
  message for Andreas Grund Don Shepherd 0 102 09-26-2013, 03:56 AM
Last Post: Don Shepherd
  Message to Eric Rechlin Etienne Victoria 3 212 09-24-2013, 07:50 PM
Last Post: john mantooth
  Message to Luiz C. Viera Peter A. Gebhardt 2 146 02-27-2013, 09:27 AM
Last Post: Peter A. Gebhardt
  Error Message/Procedure HP-48SX with TDS Survey SX card bporter101 6 316 12-10-2012, 10:18 AM
Last Post: bporter101
  WP34s Stopwatch & statistics, message for Matthew Krotzer pascal_meheut 2 170 05-23-2012, 03:30 PM
Last Post: pascal_meheut
  HP-46 faulty keys - to Katie Juergen Keller 4 182 10-10-2011, 04:23 AM
Last Post: Juergen Keller
  30b power on key codes (Q for Katie Wasserman) Harry Jacobson 2 143 10-02-2011, 06:56 AM
Last Post: Marcus von Cube, Germany
  Message concerning shipment from Samson Cables kc 6 230 09-15-2011, 12:15 PM
Last Post: Neil Gruending
  Message to Diego Diaz about HP 41 flex PCB Alexander Oestert 0 112 08-02-2011, 08:57 AM
Last Post: Alexander Oestert

Forum Jump: