PCL86 |
Omer Suleimanagich ![]() Schem.: 3 Pict.: 56 10.Mar.06 22:34 Count of Thanks: 67 |
Reply | You aren't logged in. (Guest) 1 How would one make make a circuit to utilize a PCL86 to replace an ECL86? |
John Turrill Schem.: 18 Pict.: 10 11.Mar.06 05:49 Count of Thanks: 35 |
Reply | You aren't logged in. (Guest) 2
Omer, believe it or not, I've been known to utilise a voltage doubler to feed the heaters in a case like this - bulky and a bit extravagant I know, but good ECL86's seem hard to find. A pair of 1N5401's and, perhaps, a couple of 2200mF 16v. cap.'s - the size of cap. can be used to adjust the final volts; maybe a series resistor to trim. If you have the room and the bits, I promise it works fine, but if feeding more than a pair of valves you may need more capacitance and watch the ripple current rating. Regards, John. |
Jacob Roschy ![]()
Moderator
D Articles: 1731 Schem.: 17 Pict.: 68 11.Mar.06 11:39 Count of Thanks: 24 |
Reply | You aren't logged in. (Guest) 3
Hello Omer,
Best Regards
Jacob
This article was edited 11.Mar.06 15:29 by Jacob Roschy . |
Omer Suleimanagich ![]() Schem.: 3 Pict.: 56 13.Mar.06 01:02 Count of Thanks: 20 |
Reply | You aren't logged in. (Guest) 4
Thank you very much for the prompt reply! The radio in question still hasn't been received from the seller. At this stage, I am still contemplating what restoration route I will take. I am just wondering if a "fire stick" power tube adapter could be fashioned for PCL86 use. Such an adapter would be quite useful since their is a great surplus of these tubes and the ECL86's are getting pricier. In addition, maybe adapters could be made for PL84's and UL84's too. |
Jacob Roschy ![]()
Moderator
D Articles: 1731 Schem.: 17 Pict.: 68 13.Mar.06 22:07 Count of Thanks: 16 |
Reply | You aren't logged in. (Guest) 5
It's not always possible to replace an Exx tube by an adequate Pxx or Uxx tube. Many of them have different characteristics, thus they can't be used as replacements.
This article was edited 14.Mar.06 10:56 by Jacob Roschy . |