Negative Carl.
The upgrade was to simply save the power switch. It installed a relay to
switch the high current AC carried by the front panel switch.
73
Jim W7RY
--------------------------------------------------
From: "Carl" <km1h@jeremy.mv.com>
Sent: Wednesday, April 13, 2011 6:05 AM
To: <Gudguyham@aol.com>; <Amps@contesting.com>
Subject: Re: [Amps] Which hearhkit amp would you choose?
> Step Start; early production offered an upgrade kit
>
> Metering component changes
>
> Relative power pot was a failure point, not needed
>
> Improved grid cap values...carried over from SB-221
>
> Extra safety margin in HV bypass after RFC-2
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: <Gudguyham@aol.com>
> To: <km1h@jeremy.mv.com>; <mike.lyon@gmail.com>; <Amps@contesting.com>
> Sent: Wednesday, April 13, 2011 8:52 AM
> Subject: Re: [Amps] Which hearhkit amp would you choose?
>
>
>> What improvements over an SB-221? Did away with the sensitivity control
>> (cheaper). No lighted meters (cheaper) . Circuit improvements over an
>> SB-221? What. if you don't like green, I guess it is MUCH more
>> attractive.
>>
>>
>> In a message dated 4/13/2011 8:42:32 A.M. Eastern Daylight Time,
>> km1h@jeremy.mv.com writes:
>>
>> HL-2200 if you can find one. It is a reboxed SB-221 for the most part
>> but
>> includes enough circuit improvements to make it attractive.
>>
>>
>>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1321 / Virus Database: 1500/3569 - Release Date: 04/12/11
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|