[BC] Bauer/Sparta 603

[DANA PUOPOLO]

Back in the late '70's, a college station I volunteered for had a Cetec
exciter/250 watt SS transmitter. One night they were off (carrier on but no
audio) for naintenance and I was at the tx wanting to calibrate the Moseley
TRC-15 remote control with the station. I called and called the studio on the
phone but no one answered. Finally, in frustration, I cupped my hands over the
front of the exciter and yelled: "Call the transmitter!". 30 seconds later the
TX phone rang. They had heard me loud and clear on the air monitor....

Got microphonic?

-D



------ Original Message ------
Received: Thu, 19 May 2005 09:39:24 PM PDT
From: "Mike Holderfield" <mholderfield at sw.rr.com>
To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
Subject: Re: [BC] Bauer/Sparta 603

Glad the G-G box has worked well for you.
Agreed...Paul is a great guy.

----- Original Message ----- 
From: "Chuck Leavens" <chuck at wduq.org>
To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
Sent: Thursday, May 19, 2005 9:06 PM
Subject: Re: [BC] Bauer/Sparta 603


> Well, the grounded Grid version is actually a good box. Just runs and 
> runs. Used as a driver for the 25kw PA and called the 625A
>
> I cannot say enough good things about Paul Gregg. Great guy.
>
>
>>Yes a different vintage(version) I guess.  It is a Bauer 603. 3 kilowatt.
>>I don't know the history. I guess it was made prior to the G-G model.
>>Years ago I called Paul Gregg and ordered a manual.
>>I received a manual for the G-G model. Called him back and described the
>>TX I had and the tube configuration. He said "oh...that one" and sent
>>me a manual.
>>
>>The 4CX250 ipa has some kind of transmission line tank circuit that was
>>tapped at the 180 degree point to provide out of phase drive to one
>>of the P-P finals. The end of the line drove the other one.
>>A real b*tch to balance the drive to the finals. Very touchy.
>>
>>Inductive coupled transformer type output from the finals with no
>>loading control. A fixed(manual adjustable) shorting bar for loading.
>>
>>Sounds like a great transmitter so far? <grin>
>>
>>mike
>>
>>
>>----- Original Message ----- From: "Chuck Leavens" <chuck at wduq.org>
>>To: "Broadcast Radio Mailing List" <broadcast at radiolists.net>
>>Sent: Thursday, May 19, 2005 4:29 PM
>>Subject: Re: [BC] Bauer/Sparta 603
>>
>>>  >Bauer 603 FM.
>>>>>  Single 4CX250B driving a pair of P-P 5CX1500A's
>>>>>
>>>>>  mike
>>>>
>>>>++++++++++++++MIke were they in the same cavity??  How did they tune 
>>>>them?
>>>>
>>>>Was this a Bauer or Sparta??  What power level?
>>>>
>>>>Dave
>>>
>>>I was confused by this one as I remember a 607 1kw with glass tubes and a 
>>>603 and 605 ( 3 and 5kw) both with a 4CX250 driving a 3CX3000A7 grounded 
>>>grid config. A different vintage?
>>>
>>>--
>>>Thanks,
>>>
>>>Chuck Leavens
>>>Director of Engineering and I.T.
>>>WDUQ FM Duquesne University
>>>Pittsburgh PA 412-396-5508



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