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About this product
Product Identifiers
- BrandMachlett
- MPN572B
- eBay Product ID (ePID)632587506
Product Key Features
- Compatible BrandNot Specified
- TypeTubes
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Most relevant reviews
- by oneopalnutJun 08, 2017
Good Stuff
Maybe not as good as the OEM Cetron 572b's but just as good as any RF Parts Chinese tubes. Have been driving these with 100 watts AM & 75 watts on SSB. Output after a year regular use: 370 watts (carrier) on AM & about 800 watts on most bands with 125 VAC with a Clipperton L Amp. At first these put out well over 1000 watts, with 35 watts drive (SSB), but as expected, after around 10 hours they settle down to the expected lower output. Let them getter with the filaments on for a few hours before transmitting. Start them out with only 30 watts drive & enjoy the new tube efficiency. There may be some upper frequency oscillation. But after about 20 hours use they will settle in. Also there may be some physical size difference as the Chinese quality control is as one may guess, poor. I had some 811's that has a half inch difference in height between the 4 tubes in the set. But well worth the $$. 73 Doug De N5DMCRead full review
Verified purchase: Yes | Condition: New
- by caffee1962caJun 02, 2017
I love them
I love these tubes. I bought 3 of them and I replaced them for the 811a's and they out perform them by 100%
Verified purchase: Yes | Condition: New
- by grif4giantsMay 09, 2018
Great price, good quality work great in my SB201
Great product
Verified purchase: Yes | Condition: New
- by 12mouse01Apr 10, 2017
New life for my Heathkit SB200
They brought new life to my SB200, it now puts out the wattage it was originally designed for.
Verified purchase: Yes | Condition: New
- by 256*sealeSep 16, 2018
Do it again !
No problems from my end
Verified purchase: Yes | Condition: New