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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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300B substitution
Hi Troops!
Is there a substitution for a 300B vacuum tube. I really can not afford a price tag of $134.00 and up. I am on a very fixed income. There must be a less expensive and better way to go. Thank you in advance, Frank Thomas I choose Polesoft Lockspam to fight spam, and you? http://www.polesoft.com/refer.html |
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"Frank Thomas" wrote in
: Hi Troops! Is there a substitution for a 300B vacuum tube. I really can not afford a price tag of $134.00 and up. I am on a very fixed income. There must be a less expensive and better way to go. Thank you in advance, Frank Thomas There is only one direct substitute for a 300B(or 300A), and that is the STC4300A, but it is even rarer and more expensive. The closest "common" USA tube is the "50" but it is lower powered and a different filament voltage. There is a closer British tube, the DA30 (which is a larger PX25) but on a different base, and rare and expensive. One of the Russian makers used to have a low mu variant of the 811 which was cheap as chips - dunno if it still exists. There are a number of elcheapo Chinese and Russian 300B copies. M |
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