[HamBrewers] shunt screen regulator [1 Attachment]

 

[Attachment(s) from Pramod included below]

Hi,

With the good old VR tubes becoming hard to get, a lot of hams using the 807/ 1625/6146 tube based

homebrew amplifiers tried using the Zener string arrangement for Regulating the Screen Voltage.

Sometimes, the -ve screen current produced in the tubes ( many times due to improper loading of the amp) can not only destroy such zener strings, but also any kind of regulator based on the Series Pass Transistor design.

Here is a design based on BU508 Shunt regulator based on a QST design article by K5AM, being used by vu2GHB and a couple of others for quite some time now.

73s

Pramod

__._,_.___

Attachment(s) from Pramod

1 of 1 File(s)

Screen_Shunt_Regulator.pdf

Reply to sender | Reply to group | Reply via web post | Start a New Topic

Messages in this topic (1)

Recent Activity:

• New Members 1
• New Links 1

Visit Your Group

Switch to: Text-Only, Daily Digest • Unsubscribe • Terms of Use

.

__,_._,___