Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

donate to eham
   Home   Help Search  
Pages: Prev 1 [2]   Go Down
  Print  
Author Topic: Just checking my numbers.  (Read 10201 times)
KC4ZGP
Member

Posts: 1961




Ignore
« Reply #15 on: October 06, 2017, 06:34:39 PM »

Or, do it like the old days and design a coil plug in system and have a tray full of coils for the different bands.


Oh great. More things for this corker to lose.

Be safe folks. Always be safe.

Kraus



Logged
KM1H
Member

Posts: 5511




Ignore
« Reply #16 on: October 07, 2017, 07:41:59 AM »

Quote
I've seen the W8JI example on how to do this and may try it if I feel there is a problem. My HV never exceeds Ameritron's spec of 3200V maximum where  the red starts, and the highest I see is 3150V on the meter on a good day. Most of the time it runs 3050-3100V.

If the tube starts going soft, I will replace it and test then. As long as I am getting good performance, I will leave it be.

No need to waste your time with such minutiae. As long as the AC at the socket and the plate voltages are withing reason youre good to go. It is never mentioned by JI or Ameritron that the Chinese tubes have less emission than Eimac so need a spot more filament voltage for the same output and to meet advertised specs.  The AL-80A transformer was designed for Eimac tubes and the 80B for Chinese.

Quote
Or, do it like the old days and design a coil plug in system and have a tray full of coils for the different bands.

That certainly removed many from the gene pool Roll Eyes My last plug in coil amp was built in 1957 and sold in 61 while I was still in the USN.

Carl
Logged
N9AOP
Member

Posts: 1173




Ignore
« Reply #17 on: October 07, 2017, 01:28:54 PM »

Kraus,
Why would you neutralize a single tube amp?
Art
Logged
KC4ZGP
Member

Posts: 1961




Ignore
« Reply #18 on: October 07, 2017, 03:34:32 PM »


Art,

Another reason I shouldn't own a tube amplifier. I'm liable to kill my self.

Thank you.

Kraus
Logged
Pages: Prev 1 [2]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!