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572B Tubes Available
- Thread starter RatsoW8
- Start date
How good are they? Are they anything close the Cetrons? Curious as to how they stack up to the old school Cetrons and RCA's.
~Cheers~
~Cheers~
RF Parts tells the whole story in a pdf document on their website which I attached below. They chose to stop ordering Cetrons in 1989 due to high prices and started working with a Chinese factory. The tubes they are selling are made specifically for them, labeled as Taylor tubes and they say the quality control is really tight on the tubes.
I will. The original Cetrons are still in the amp showing full output but I'll drop the new ones in for some testing and post the results.
Ratso, you have my thanks. 
Good read on the story, should be interesting to see how this new batch fares. Keep us posted on your results!
~Cheers~
Good read on the story, should be interesting to see how this new batch fares. Keep us posted on your results!
~Cheers~
Looking at their site, I'm still not sure if you can just buy them direct now or you still have to be put on a waiting list. I also noticed that they didn't list the option for a matched pair, just single, triple or quad. Probably just an overlooked that entry on their site. Guess I'll call and see if i can get two now.
When the options to buy appear on the 572 Page they are in stock and available for purchase. They cleared the wait list with the first shipment. This is the second. Once the tubes are gone the options to buy will disappear until they get more in stock. I just checked the page and single tubes and matched sets of four are still available. The option to buy a matched set of two tubes has disappeared.
My matched set of two tubes shipped yesterday.
My matched set of two tubes shipped yesterday.
The tubes arrived in perfect condition. I was going to install them last weekend but the SB-200 took a dump. I pushed the power switch on Saturday and saw the meter lamp light for a split second and go out. Power never actually came up on the amp. There is power to the on/off switch and it tests ok so I think something opened in the soft-start module which is next in-line.
Going to try to pry it off the chassis (it's glued on) this weekend and check the resistors.
Going to try to pry it off the chassis (it's glued on) this weekend and check the resistors.
So I poked around the soft start board last night and found one of the 10 ohm 10 watt resistors to be open. Radio Shack still stocks these resistors and my local store has them. I hope the fix is that easy
I replaced the two load resistors in the soft start module and the amp is working fine with the new tubes. I removed the Cetrons that were in the amp to tset the amp for the smoke test of course..
The new Taylor tubes from RF Parts look like copies of the Cetrons I'm keeping as a back up set. With 65 watts drive the amp runs about 650 watts 80-15m and about 500 on 10m. That's assuming the meter on my tuner is colse and I think it is.
The new Taylor tubes from RF Parts look like copies of the Cetrons I'm keeping as a back up set. With 65 watts drive the amp runs about 650 watts 80-15m and about 500 on 10m. That's assuming the meter on my tuner is colse and I think it is.
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