>
>Hi Rich,
>-
>Up until your post, I'd never thought about a justified
>reason to install a standby switch on an amplifier
>like the SB-220. There is a valid reason after all.
>-
>Every used SB-220 I've refurbished had the switch
>mounted because the owner thought the tubes
>needed a few minutes of warm up.
>-
? 3-500Zs take abour 1/2 second to reach full suds.
>I will admit that I use the standby capacity while
>checking things out before regular operation. I
>always verify the drive levels and antenna system
>while the amplifier idles. Makes me feel better...
>old habits die hard.
>-
? The on/off switch allows one to do such,
>When I switch my amplifier off after modest use,
>I can hear the tubes "crinkle."
>-
? This is pretty typical as the parts cool. However, If one has just
completed a traditional, 10-minute Zzzzzzz-ville monologue on
AM/lock-to-talk, afterward the tubes should be allowed cool down for
15-seconds or so before switching the amp. off. The TL-922 does this
automatically.
Cheerz, Skipp
>-
>-snip-
>>Normally I would just live with the unsightly holes many hams have
>>butchered into SB-220's to add an unneeded relay bypass switch...
>-
>Adding a switch to break the PTT path was a common trick for contesters.
>It was needed to allow an instant band change to work a multiplier
>barefoot
>then return to the run band at full power.
>-
>My guess is more were modified then not and keeping the switch retains
>the flavor of the amp's contest history.
>-
>Rich KL7RA
>
>
>
>
>________________________________________________________________
>GET INTERNET ACCESS FROM JUNO!
>Juno offers FREE or PREMIUM Internet access for less!
>Join Juno today! For your FREE software, visit:
>http://dl.www.juno.com/get/web/.
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
--
FAQ on WWW: http://www.contesting.com/FAQ/amps
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
|