Happy 'Hump day' to all, I did a little investigation based on suggestions from members of the group. In preparation for running the amp with only one tube, and then the other tube, figured I would d
Thanks for you cautionary input, Jim, I have the two originals, here, on my desk. Two of the non-pedigreed spares are in the amp now, with no HV, cooking. I plan on also using my 'never-before-used'
Hello all, Put two spares in the amp chassis, defeated the HV and let it 'cook' for 48 hours. Hooked the HV up and let it cook a while longer while I shoveled the new batch of snow. Tuned it up by th
Hello all, Thanks for the numerous cautionary emails I received regarding Beryllium Oxide dangers dealing with opening a tube up. If I do anything now, it will be outside with my torch to de-solder i
Hello all, Since it's gotten quiet here, i thought I would get the collective 'gray matter' working again. I am having a strange problem with a homebrew 8877 amp. It has worked almost flawlessly for
Hi Gerald, One of the guys brought up the idea that the vacuum relay may have reached the end of it's life, but we didn't check it out at that point. It was NOS when I got it 30 years ago, and no tel
I do have another tube that I can swap out, but hasn't been used in YEARS. May want to let it 'cook' without HV for a couple of days. Steve 73 Jim W7RY Hi Gerald, One of the guys brought up the idea
Hello Jim, This is something that should be easy enough to do and does make some sense. Will wait till next week to deal with it as I will be very involved in the WPX CW contest this weekend. Thanks.
Hello all, WPX is over so Mike, K4GMH and I, dug back into the amp. We discussed the various suggestions and decided that the one to try first was shorting out the vacuum relay to parallel any bad co
Hello all. Question for the experts. How does using a Variac to control the output of a HV transformer affect things like efficiency? I think it would be reasonable to think that a transformer operat
Hello all, Thanks to everyone for the informative responses. Although I've now got more info to use in order to figure out what I am going to do, I'm not sure what that will be. It's really just a bi
As some high power CB'ers refer to power as measured with a Bird meter as "Bird watts", what would you call these; ..." S/H watts"? Steve NR4m Sent from my iPhone ____________________________________
Hello all, Who was it on the list that had large value electrolytic capacitors for sale? Please contact me directly. 73 de Steve, NR4M _______________________________________________ Amps mailing lis
Hello all, I have had plenty of amps in the past and currently own a bunch. I have a question for the group because this situation hasn't come up before with me and amps. I have recently bought an Ac
Hello all, One thing I don't see being considered is how often do you need to replace an amp tube. Running a multi multi contest station, I have a bunch of amps. A 35 year old 4-1000 which uses a 'pu
Hello all, One thing I don't see being considered is how often do you need to replace an amp tube. Running a multi multi contest station, I have a bunch of amps. A 35 year old 4-1000 which uses a 'pu
Wow! I am continually amazed at how many hams have ZERO desire to learn anything about the hobby. I have tried for years at the local club level, to be an 'Elmer', and be available to share my knowle
Hello all, This is spooky-weird. I have been following this thread from the beginning only because I am the original owner of a 425 amp. Just general interest. A few days ago, I started trouble shoot
I can not imagine anyone wanting one 'that bad'. Steve, NR4M https://www.alpharfsystems.com/?ec_store=meter-alpha-77sx-77dx-ammeter-black-case Not sure if the meters in the Alpha store are OK for the
Hello all, Figured I would ask the amps 'brain trust' about this. I recently was given a URT23 military amp, power supply and exciter. It looks 'as new' and has all the interconnect cables. The final