[Amps] Raytheon ?

[Osten B Magnusson]

Friends!

Anyone who knows what Raytheon 572B's are, manufactered in USA, and
if so, when? 

Comparison to Cetron?  I have been offered a pair for USD 130. 

Have also seen that Ross sells Cetron 572B's for 88 USD, Burghardt 
wants USD 129...  Both those prices are for ONE tube! 

But main question, what is Raytheon?

73 de Osten SM5DQC    sm5dqc at algonet.se  or  sm5dqc at arrl.net