tubes age 46
>>>>use the Radio Shack 32-1031 transformer, use the 10 watt tap, closest to
600 ohm Or, use the Hammond 600 ohm to 4 or 8 ohm from AES. ( works great
)
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Date: Fri, 18 Aug 2000 19:20:26 -0500
Subject: Re: [R-390] Rectifier Tube Sub
5R4 sets the specs, the added letters only describe minor variations in
envelope. G are tapered with stright top. GA and GB are straight, WGB have a
stronger base that enclose more of the straight glass and mil spec for vibration
and shock.
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Date: Fri, 18 Aug 2000 21:49:28 EDT
Subject: Re: [R-390] Rectifier Tube Sub
Jerry as usual sets it straight. I should have mentioned that the Hammarlund
marked tube was a 5R4WGB, these tubes are damn near bulletproof. It is also
an excellent replacement ( if room permits ) for the 5Y3 series tubes.
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Date: Fri, 18 Aug 2000 21:33:10 -0500
Subject: Re: [R-390] Rectifier Tube Sub
Most of the 5 volt rectifier tubes have the same pin connections. But some draw
more filament current than others. Dropping a 5U4 in a 5Y3 socket will be
overloading the transformer 5 volt winding by 50%, not an instant disaster but
running that insulated filament winding warmer than normal will shorten the life
of the insulation. To say nothing of the tube probably being starved for filament
power. Its important to check the tube manual for the rated filament current
when making such substitutions.
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Date: Sat, 19 Aug 2000 01:31:37 EDT
Subject: Re: [R-390] Rectifier Tube Sub
A 5U4 isn't a good sub for a 5Y3, I thought I said that the 5R4 was.
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Date: Sat, 19 Aug 2000 08:38:54 EDT
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