How to Properly Change tubes??

[Cj1]

i ordered new tubes for my Dak Mark X. just want to know if there is something special i should be doing when i change the tubes. i have Never owned a tube set, and never changed tubes.
is it just as simple as pulling them out and popping the new one's in??

Thanks!
- Joe

[Night Crawler]

is it just as simple as pulling them out and popping the new one's in??

That's about it just make sure the pins are lined up. There will be a space or a notch on the bottom of the tube and the tube socket that shows the correct way to put them in.

[Cj1]

Excellent!! Thank you

[CHASER(021)]

Lets not forget about burn in time 4 or 5 hours of radio on time B4 key down.

[721HACKSAW]

If those tubes are new/old stock they could have been laying on a shelf somewhere for years. These old tubes tend to get air inside them over the years. I install tubes then do a "burn in" for at least 24 hours. This may be overkill but several info sources say to use a Variac to start the filament voltage low and bring it up slowly over a certain time period.

[Cj1]

If those tubes are new/old stock they could have been laying on a shelf somewhere for years. These old tubes tend to get air inside them over the years. I install tubes then do a "burn in" for at least 24 hours. This may be overkill but several info sources say to use a Variac to start the filament voltage low and bring it up slowly over a certain time period.

by "burn in" you mean just leave the radio on and don't key it up?

[Tinman590]

Yes just turn it on and leave it on all night. I have a dak myself they are great ole bassy radios. Good luck.

[Cj1]

Yes just turn it on and leave it on all night. I have a dak myself they are great ole bassy radios. Good luck.

yea i like it. it was my uncles old rig. was sitting here doing nothing.. so Boom.. fixed it up, wired a Turner to it,unlocked the Clarifier.. and new tubes should do it!

[Tinman590]

Yes just turn it on and leave it on all night. I have a dak myself they are great ole bassy radios. Good luck.

yea i like it. it was my uncles old rig. was sitting here doing nothing.. so Boom.. fixed it up, wired a Turner to it,unlocked the Clarifier.. and new tubes should do it!

That turner will sound reall nice on that radio. I ave the super sidekick on mine

[Cj1]

Yes just turn it on and leave it on all night. I have a dak myself they are great ole bassy radios. Good luck.

yea i like it. it was my uncles old rig. was sitting here doing nothing.. so Boom.. fixed it up, wired a Turner to it,unlocked the Clarifier.. and new tubes should do it!

That turner will sound reall nice on that radio. I ave the super sidekick on mine

That's what i wired up to mine.. the Astatic that came with the Dak was too Tinny!

[drdx]

I typically carefully remove the lid from the unit, and verify that I am about to replace the proper component, then discharge it with my Harrison Vacuum Component Varactor 1250b probe discharge module(that's all made up), then I write down the number. Then I do my research and find out what doesn't use that tube. Then, it's "bang bang bang, yep, 8950, 12by7a, I see you, you fantastic beer drinking evening killing vacuum tube piece of $%%^^&*" then I beat it with a hammer until you can't tell if it is a betamax or an 8 track player, then replace it with what I want.


-drdx

[Tinman590]

Yes just turn it on and leave it on all night. I have a dak myself they are great ole bassy radios. Good luck.

yea i like it. it was my uncles old rig. was sitting here doing nothing.. so Boom.. fixed it up, wired a Turner to it,unlocked the Clarifier.. and new tubes should do it!

That turner will sound reall nice on that radio. I ave the super sidekick on mine

That's what i wired up to mine.. the Astatic that came with the Dak was too Tinny!

Yeah everybody told me I sounded like my nose was plugged with the D-104

[Cj1]

got the tubes today... put them in. let radio warm up a few hours.. AM is fine.. sideband no modulation at all.. i'm letting the radio cool, and i'm going to replace the 12by7a to the old one and see what happens

[Cj1]

no sideband at all.. with new tubes and old.. HELP!!

[Cj1]

never mind, fixed it. thx