[TenTec] In praise of older technology

Tue Mar 4 10:52:01 EST 2014

Some rigs yes. Some rigs no. It doesn't necessarily follow that something is wrong with the equipment. If you want an example, try looking at a Drake manual.

Best regards - Bry Carling

> On Mar 4, 2014, at 10:36 AM, "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de> wrote:
> 
> Bry,
> 
> Tuning the Plate control for max smoke results in dipping Ip, or at least
> within a few percentage points thereof.
> If it doesn't on your amp, there's something wrong with the amp.
> 
> I will only stipulate that I have not run a class C amp for over 40 years
> now.
> I'm speaking about an amp running AB1 or AB2 like all of our modern amps do.
> Peak is just fine.  Dip is not necessary.
> 
> Of course we start with the load backed off where we know the Ig will not be
> excessive.
> 
> 73 - Rick, DJ0IP
> (Nr. Frankfurt am Main)
> 
> -----Original Message-----
> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of
> bcarling at cfl.rr.com
> Sent: Tuesday, March 04, 2014 2:35 PM
> To: Discussion of Ten-Tec Equipment
> Subject: Re: [TenTec] In praise of older technology
> 
> 
> 
> 
>> On 1 Mar 2014 at 23:14, Rick - DJ0IP / NJ0IP wrote:
>> 
>> "Dip" was pre-watt meter days.
>> No need to dip anymore.
>> 
>> Just tune for maximum smoke!
> 
> 
> Rick - DJ0IP / NJ0IP  ALSO wrote:
> 
>> this is always subject to the
> Ig not exceeding max specs.
> 
> And yes of course Rick - that is precisely why we dip Ip first before
> everything else, and always watch for not exceeding maximum plate current
> rating as well as maximum Ig rating. 
> 
> My Centurion 442 wants to get back on the air...  but it is  waiting
> patiently to be dipped and peaked again when the rewound plate transformer
> arrives back home!
> 
> YMMV - de AF4K, Bry
> 
>> Precisely, running full drive power, you first tune the PLATE for max 
>> smoke, then repeat the sequence of slowly advancing the LOAD and 
>> peaking the PLATE for max smoke.
>> If you reach the point where increasing the LOAD and peaking the plate 
>> brings no more increase in max smoke, but just an increase in Ig, then 
>> you've gone too far. Back it off.
>> 
>> The idea is to find the exact point where max smoke is reached with 
>> min LOAD that can achieve it - and of course all of this is always 
>> subject to the Ig not exceeding max specs.
>> 
>> Piece of cake.
>> 
>> The only thing I do different in practice is, I first tune for max 
>> smoke with about 30w of drive, just to get everything in resonance, 
>> then I proceed as described above.
>> 
>> Dip?  40 years ago, maybe!
>> 
>> 73 - Rick, DJ0IP
>> (Nr. Frankfurt am Main)
>> 
>> 
>> -----Original Message-----
>> From: TenTec [mailto:tentec-bounces at contesting.com] On Behalf Of Bob 
>> McGraw
>> - K4TAX
>> Sent: Saturday, March 01, 2014 10:00 PM
>> To: Discussion of Ten-Tec Equipment
>> Subject: Re: [TenTec] In praise of older technology
>> 
>> The only thing I ever "dip" is a little chew.
>> 
>> 73
>> Bob,  K4TAX
>> 
>> 
>> ----- Original Message -----
>> From: "Brian Carling" <bcarling at cfl.rr.com>
>> To: "Ed Purvis" <wa4njy at yahoo.com>; "Discussion of Ten-Tec Equipment" 
>> <tentec at contesting.com>
>> Sent: Saturday, March 01, 2014 2:18 PM
>> Subject: Re: [TenTec] In praise of older technology
>> 
>> 
>>> Ed you must be talking about those XE stations tuning up on SSB on 
>>> the low
>> 
>>> end of 40m. They groan "hoooooo-la" while they dip the plate control !
>>> SOP
>>> 
>>> Best regards - Bry Carling
>>> 
>>> 
>>> 
>>>> On Feb 22, 2014, at 8:29 PM, Ed Purvis <wa4njy at yahoo.com> wrote:
>>>> 
>>>> There are some on hi-fi sideband that I am not sure they are 
>>>> talking or their stomach is making noise.
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> ________________________________
>>>> From: Steve Berg <wa9jml at frontier.com>
>>>> To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
>>>> Sent: Saturday, February 22, 2014 8:12 PM
>>>> Subject: Re: [TenTec] In praise of older technology
>>>> 
>>>> 
>>>> 
>>>> 
>>>> As part of my collection, I have Drake 2B receiver and a Gonset 
>>>> GSB100 phasing exciter.  One night I wound up in a round table with 
>>>> a bunch of HiFi SSB aficionados 0n 40 meters.  These guys were 
>>>> running advanced equalizers and high-end microphones. Then had the 
>>>> latest Oriental Transceivers. They even had audio spectrum 
>>>> analyzers to check out each others signals.  So, I asked for an 
>>>> evaluation, and they were quite complimentary.  So, they asked what 
>>>> I was running, and I told them a
>>>> 1957 vintage phasing exciter with a D104 mic.  They were amazed!  
>>>> Sure, it drifts, and it is hard to get it right on frequency by 
>>>> zerobeating the receiver BFO with the carrier on the exciter.  But 
>>>> it is a lot of fun to use.
>>>> 
>>>> Steve WA9JML
>>>> 
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