[Amps] 8874?

[Adrian Rees]

Erm, the MLA2500 uses the 8875 not the 8873. Sorry for being a pedant !
 
I have never seen a Dentron DTR-2000 and am curious to see the circuit diagram. I must admit I do like Dentron amps, even though they all seem to suffer from dodgy power supplies (still rebuilding my MLA2500B's supply !)
 
Best wishes
 
Adrian MW1LCR 

________________________________

From: amps-bounces at contesting.com on behalf of Roger
Sent: Wed 01/07/2009 09:21
To: Charles Harpole
Cc: amps at contesting.com; herzog at frontiernet.net
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
>
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> 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
>
> 
>
> 
>
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>  
>> 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.)
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>      
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