[Boatanchors] 5U4 vs 5Y3
gzook at yahoo.com
Sat May 24 15:18:10 EDT 2014
The ratings in tube manuals for both the 5U4 and 5Y3 are somewhat confusing. There is a rating given for each plate and that is generally around 80 mA for the 5Y3 and around 150 mA for the 5U4. However, there are 2-plates in each tube and, when one looks at the figures for "half load" and "full load" give the actual performance of the tubes under most conditions. The actual "normal" configuration of the tubes gives 150 mA for the 5Y3 under "full load" and 300 mA for the 5U4 under "full load".
On Saturday, May 24, 2014 2:04 PM, K7NKS via Boatanchors <boatanchors at mailman.qth.net> wrote:
When you say "testing purposes". What are you testing? How long?
The 5U4 is a big rectifier with substantially more capability than the 5Y3. Testing a hefty rig like a transmitter could really stress a smaller rectifier tube. Testing a small receiver should be ok for short time.
Good idea to check your fire extinguishers, fire/smoke alarms, and fire insurance.
73 Chuck K7NKS
Sent from my iPad
On May 24, 2014, at 11:33 AM, "Bob Jackson" <bob145 at suddenlink.net> wrote:
> Can a 5Y3 be subbed for a 5U4 for testing purposes?
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