[Amps] Which hearhkit amp would you choose?

[Carl]

----- Original Message ----- 
From: "Jim W7RY" <w7ry at inbox.com>
To: "Carl" <km1h at jeremy.mv.com>; <Gudguyham at aol.com>; <Amps at contesting.com>
Sent: Wednesday, April 13, 2011 10:42 PM
Subject: Re: [Amps] Which hearhkit amp would you choose?


> Ok Carl...
> The kit is Heathkit part number 830-94. I is simply to increase the 
> capacity of the power switch with a relay.
>
> This guy is so miss informed (like me so YOU say) that he installed the 
> power switch mod AND a Harbaugh step start mod in the same amplifier! 
> Please see the picture!! BTW, the resistors near the relay are for 
> dropping the coil voltage when the amp is used on 240 volts. Oh, and 
> Heathkit used the exact relay for switching the AC in the Heathkit 
> SB-1000.
> http://www.pestingers.net/HL2200.htm


Yep, some really are and remain confused.


>
>
> Please see Heathkit Mod # HL-2200-4
> http://www.tech-systems-labs.com/service/hl2200.txt


Yep, it served one purpose as well as the Harbach does, its still just a 
soft start and anyone adding another isnt wired too tight.


>
>
> I just shake my head Carl...

Best done with a mirror.

Carl
KM1H


> 73
> Jim W7RY
>
>
> --------------------------------------------------
> From: "Carl" <km1h at jeremy.mv.com>
> Sent: Wednesday, April 13, 2011 6:25 PM
> To: "Jim W7RY" <w7ry at inbox.com>; <Gudguyham at aol.com>; 
> <Amps at contesting.com>
> Subject: Re: [Amps] Which hearhkit amp would you choose?
>
>> Negative is wrong Jim.
>>
>> Its called a step start and serves the function it was designed for. 
>> There is no other reason to use a step start in a SB-220 as the 
>> transformers are current limited, the switch is the weak link and pretty 
>> unobtanium. When switching to more C in the PS then it will also help 
>> there.
>>
>> Carl
>> KM1H
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Jim W7RY" <w7ry at inbox.com>
>> To: "Carl" <km1h at jeremy.mv.com>; <Gudguyham at aol.com>; 
>> <Amps at contesting.com>
>> Sent: Wednesday, April 13, 2011 8:30 PM
>> Subject: Re: [Amps] Which hearhkit amp would you choose?
>>
>>
>>> 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 at jeremy.mv.com>
>>> Sent: Wednesday, April 13, 2011 6:05 AM
>>> To: <Gudguyham at aol.com>; <Amps at 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 at aol.com>
>>>> To: <km1h at jeremy.mv.com>; <mike.lyon at gmail.com>; <Amps at 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 at 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.
>>>>>
>>>>>
>>>>>
>>>>
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>>>>
>>>>
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>>
>>
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