[ARC5] An "Extra Class" Question:

[Geoff]

Ive repaired several DX-100's and TX-1's with blown mod transformers and not 
due to Hammy Hambone mods.

My own rigs are a Johnson V-I and V-II plus a Collins 32V2 which already had 
a replacement mod transformer. I run some serious audio mods to the Johnsons 
but keep the power down to 80-90W since they are usually driving amps and 
dont need iron to be stressed.

Carl
----- Original Message ----- 
From: <wb3fau55 at neo.rr.com>
To: <hpnpilot at gmail.com>; "Geoff" <geoffrey at jeremy.mv.com>; 
<arc5 at mailman.qth.net>
Sent: Friday, February 08, 2013 6:05 PM
Subject: Re: [ARC5] An "Extra Class" Question:


> never had a  problem with a Heathkit, but yes, the Johnson stuff is a bit 
> lite.
> AMers are using a  lot of  cool ideas, like  negative cycle loading,  it 
> gets  good
> results.  I have a  much modded Apache,  lots of audio  and sounds  great.
> ---- Geoff <geoffrey at jeremy.mv.com> wrote:
>> Hard limiting is after the mod transformer and is also called high level
>> limiting. That can be real rough on an inadequate transformer as many 
>> have
>> fried a Johnson, Heath and others.
>>
>> Carl
>>
>>
>> ----- Original Message ----- 
>> From: "Peter Gottlieb" <hpnpilot at gmail.com>
>> To: <arc5 at mailman.qth.net>
>> Sent: Thursday, February 07, 2013 11:49 PM
>> Subject: Re: [ARC5] An "Extra Class" Question:
>>
>>
>> > Hard or soft limiting?
>> >
>> >
>> > On 2/7/2013 11:47 PM, Richard Knoppow wrote:
>> >>
>> >> ----- Original Message ----- From: <arc5 at ix.netcom.com>
>> >> To: "Paddy Ryan" <pei7cn at eircom.net>; <arc5 at mailman.qth.net>; "Geoff"
>> >> <geoffrey at jeremy.mv.com>
>> >> Sent: Thursday, February 07, 2013 11:18 AM
>> >> Subject: [ARC5] An "Extra Class" Question:
>> >>
>> >>
>> >>> The output tranformer secondary of a plate modulator delivers 300 V 
>> >>> RMS
>> >>> at 100% modulation.  What device at what specs can be connected 
>> >>> across
>> >>> this secondary to prevent modulation excursions beyond the specified
>> >>> level?
>> >>>
>> >>     I am not quite sure if this is a quiz question or a serious 
>> >> question.
>> >>
>> >>
>> >> -- 
>> >> Richard Knoppow
>> >> Los Angeles
>> >> WB6KBL
>> >> dickburk at ix.netcom.com
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