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 91 
 on: June 11, 2019, 06:10:40 AM 
Started by NW2K - Last post by NW2K
Thanks again for your help.  Yes, I know about the gettering process, RF testing and emission/lifetime tests for those tubes, my question concerns hipot testing and proper protocol.  I've been relying on these linked Eimac documents, but as mentioned, they concern certain big tubes:

http://www.arimi.it/wp-content/Eimac/Hi%20Pot.pdf

https://www.cpii.com/docs/related/22/AB21.pdf

For now, I'll continue using the Eimac Application Bulletin 28 as a guide and I need to add some better metering at lower leakage current.  I'll try to report back on what I learn about all of this.  Thanks, 73, Dean

 92 
 on: June 10, 2019, 11:57:17 PM 
Started by W3MMR - Last post by kb3rdt
if you want look original get the amber.

I use them in my NC-300 receiver they been in there for 5 years now!

 93 
 on: June 10, 2019, 09:46:32 PM 
Started by W3MMR - Last post by W3MMR
Looking for replacement bulbs for the 100. The VFO and meter lamps. Anyone try LED replacements? The book doesn't say much as far as wattage or anything as far as the orginals go. They look jist like automotive bulbs. Anyway, i would like as bright as i can get. Thanks in advance

Perry
W3MMR

 94 
 on: June 10, 2019, 08:37:30 PM 
Started by Opcom - Last post by Opcom
I totally forgot:

Big Storms and Power Outages!

Dallas, Texas. huge outage.

some haiku:

The generator, monstrous and able.
A gallon per hour, the machine song.
3 days, my wallet cries.

 95 
 on: June 10, 2019, 07:56:15 PM 
Started by N1XBM - Last post by n1ps
I mounted the meters and shunts in the RF deck, more because there was space in the RF cabinet.  I also think it better to monitor each module and would prefer one wire pair to feed the deck (DC) rather than 4.  I bypassed all wires going in/out of the RF deck, the fewer the better.

~ps

 96 
 on: June 10, 2019, 07:04:28 PM 
Started by PA0NVD - Last post by K4RT
Nico,

Sorry to hear this. A prayer for you for better health soon.

Brad


 97 
 on: June 10, 2019, 06:45:07 PM 
Started by VA3GRV - Last post by W3GMS
My good friend Chuck - NA3CW did his 920 up for stellar AM several years back.  Chuck is very competent engineer and spent some time working through the issues to get it sounding fantastic on AM.  His email is good on QRZ.com. 
73,
Joe-W3GMS 

 98 
 on: June 10, 2019, 06:04:03 PM 
Started by PA0NVD - Last post by PA0NVD
thanks Bill

 99 
 on: June 10, 2019, 05:33:15 PM 
Started by WA2SQQ - Last post by PA0NVD
Must have been a weak transistor.
The protection depends upon the application. There isn't much reason for the 0.1 uF except RF decoupling in a high RF environment. A diode should be sufficient.
But the diode makes the relay slow at fall off. If you want a very fast relay, leave the diode away and limit the collector voltage spike with a zener of e.g. 20 - 36 V across the transistor or a transzorb.

 100 
 on: June 10, 2019, 05:07:03 PM 
Started by VA3GRV - Last post by VA3GRV
Hello members, 

I'm just looking for some info on improving my AM audio with my FT 920 . I do have some gear to use with it but I'm looking for anyone that has worked on one . Thanks for your time .

73 Vince

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