[Amps] 8874?

[Carl]

The DTR2000L is a perfect example of Dentron engineering or more accurately 
the lack of.

No grid current meter, no grid protection, the 8877 cooled by a muffin fan 
(later ones used a small blower) and blowing directly at the tank circuit 
are just a few of the gems in that amp.

Carl
KM1H



----- Original Message ----- 
From: "Roger" <sub1 at rogerhalstead.com>
To: "Charles Harpole" <k4vud at hotmail.com>
Cc: <amps at contesting.com>; <herzog at frontiernet.net>
Sent: Wednesday, July 01, 2009 4:21 AM
Subject: Re: [Amps] 8874?


>
>
> Charles Harpole wrote:
>> about 20 yrs ago, I bought a Dentron DTR-2000 for $800.
>>
>>
>>
> The DTR-2000 used a single 8877/3CX1500A7 which is much larger
> physically than the 8874. I was getting 8877s at the time for $305 (at a
> discount)and had a number of them (when the DTR2000 first came out) I
> liked the amp, but the voltage regulation was poor and IIRC a bit on the
> low side.  I had one of the low voltage caps explode. It was loud enough
> to make my ears ring. It blew the can right off, which hit the top of
> the cabinet. The can looked like a 38 wad cutter that had hit something
> really hard.
>
> The MLA2500 used the 8873 (Aluminum anode and transverse cooling) I
> believe while the 8874/3CX400 is used in the old alpha 76 and 78 series.
> Back then it was much less expensive.Now days you can get 3CX800s for
> less although new 8874s and 3CX800s from Eimac are quite pricey.
>
> 73
>
> Roger (K8RI)
>> I figured I bought the tube (which is what a new one
>>
>>
>>
>> went for then) and got the amp for free.  It drives
>>
>>
>>
>> so easily and puts out POWER.... great tube.
>>
>>
>>
>> Anyone know how many (less than 500???)
>>
>>
>>
>> DTR-2000 were made????   73
>>
>>
>>
>> Charles Harpole k4vud at hotmail.com
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>> From: hsu4qro at gmail.com
>>> To: herzog at frontiernet.net; amps at contesting.com
>>> Date: Tue, 30 Jun 2009 12:18:02 +0800
>>> Subject: Re: [Amps] NCL2000
>>>
>>> That is natural, My friend pick up a Heny Tempo 2001, the cost only 
>>> $250, he ask me to find a pair inexpensive brand new NOS EIMAC 3CX8874A, 
>>> a guy who in this list ask $400/ea.Could you help him
>>> to find inexpensve pair?
>>> 73!Hsu
>>> ----- Original Message ----- 
>>> From: "Herzog" <herzog at frontiernet.net>
>>> To: "Ham-amps" <amps at contesting.com>
>>> Sent: Tuesday, June 30, 2009 8:16 AM
>>> Subject: [Amps] NCL2000
>>>
>>>
>>>
>>>> RE: Hi,
>>>> I have some brand new NOS RCA 8122 for sale,I ask $350/ea or tell me
>>>> what's your best offer.
>>>> And another guy wanting parts of no description.
>>>>
>>>> Herzog, from Different world! Prices, I Had my NCL2000 up for sale,
>>>> asking $600; and no takers for 2 years. And it included 4 spares 811
>>>> tubes, plus the ones inside a perfect operating Ampflier
>>>> I finally just gave to antique collectors!! See if the AWA wants to
>>>> sell. (Antique Wireless Association.)
>>>> _______________________________________________
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>>>>
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