| Author |
Message |
    
HONKY TONK MAN 593 OUTTA NC!!
| | Posted on Saturday, October 06, 2001 - 10:56 pm: | 
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just got a maco tube linear today has 7 tubes in her. i get about 300 out of her or so at 6 watts in is this ok can i go more or less?? anyone have any instructions on a maco 300 tube linear?? i never had tube linear before . i traded my excaliber base radio for it so im hoping to find out as much as i can on it. also what are the tubes and where do i get them if i ever need them?? thanks guys and gals..... |
snuffy
| | Posted on Sunday, October 07, 2001 - 9:33 am: |
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hi i have a maco -300 i was told not
to put more than 4-5 watts into it
said the keying circuit would not
handle it. i realy like mine it has
all 8950's in it does real good. |
HONKY TONK MAN 593 OUTTA NC!!
| | Posted on Sunday, October 07, 2001 - 8:08 pm: |
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yeah im using a pdc meter and i turned my radio down to 3 watt with a lot of swing and i still hit 300-350 am peak power. this seems to be a real nice linear. where do i even get extra tubes?? thanks for info. |
jyd
| | Posted on Monday, October 08, 2001 - 4:23 pm: |
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i have had 2 maco 300 and best deadkey is about 3 watts and i got 800 out of both boxes if all you get is 350 you need tubes and there not cheap look www.bills2way.com he has some,my buddy got 1000 watts out of his when you replace the tubes take a long screwdriver and ground it to the caseing of the box then while touching the side of the box touch the top of each tube to get the voltage remaining in the caps out |
jyd
| | Posted on Monday, October 08, 2001 - 7:34 pm: |
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make sure you know how to adjust it hold it keyed look at your watt meter and adjust the load to the highest point of wattage then do the same to the tune,if you dont your tubes will give out |
HONKY TONK MAN 593 OUTTA NC!!
| | Posted on Tuesday, October 09, 2001 - 7:01 pm: |
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oh yeah the guy showed me that im going to retube it when it dies for now it works well for me. thanks for info!! happy dxing see ya around 26.935 am |
Joe
| | Posted on Thursday, October 11, 2001 - 8:04 am: |
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This is similar to the Skipper 300 question. You can retube them for less expensive tubes. However, you will need to leave one 8950 in it but the other 6 would be much less expensive. Let me know if you need more details. I have done this to several Skippers and a Maco 200. |
jyd
| | Posted on Wednesday, October 10, 2001 - 4:42 pm: |
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dont wait until they go out completley,cause you might be fixing mor than tubes |
HONKY TONK MAN 593 OUTTA NC!!
| | Posted on Thursday, October 11, 2001 - 6:51 pm: |
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well i would leave the driver tubes the 2 ....8950s in there but what would the other tubes cost and what are they?? thanks for any info. |
Joe
| | Posted on Tuesday, October 16, 2001 - 8:10 am: |
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You can email me about the other tubes and the conversion required. I just got a Maco 300 in that I am getting ready to convert. It is a little crispy in places so it will be a slow process but I can tell you more about yours.
jp1116@netzero.net |
SHADOW 804
| | Posted on Wednesday, October 17, 2001 - 9:45 pm: |
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You Should Be Able To Find Tubes Here :: WWW.THETUBESTORE.COM 8ZERO4 . |
HONKY TONK MAN 593 OUTTA NC.
| | Posted on Thursday, October 18, 2001 - 8:04 pm: |
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nope not there. checked but thanks anyway shadow. |
GRAYHOUND
| | Posted on Friday, October 19, 2001 - 8:14 am: |
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CHECK OUT "ANTIQUE RADIO SUPPLY" !
I GET MY OLD MLITARY TUBES FROM THEM !
I DON'T HAVE MY BOOK OR THE URL WITH ME AT THIS MOMENT ; JUST RUN A SEARCH FOR THE Co. ON LINE , AND IT SHOULD SHOW UP SOMEWHERE ON THE SEARCH RESULTS PAGE !
GOOD LUCK ,
"GRAYHOUND"
P.S. 8950's ARE GOING TO BE HIGH $$$ ANYWHERE YOU FIND THEM ; FROM MY EXPERIENCE !!!
I'D HAVE IT SET UP FOR DIFF. TUBES TOO !
I HAD MY AMP DONE THAT WAY .. REPLACED 12 TUBES FOR 6 BETTER ONES & GOT MORE POWER & MORE DURABILITY TO BOOT !
BUT I HAVE A GREAT TEC. GUY THAT'S THE BEST I'VE SEEN WITH OLD TUBE RIGS !
"LUCKY ME" |
Joe
| | Posted on Friday, October 19, 2001 - 10:25 am: |
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Here is another place. They are the best price I have seen from a dealer. Still double what I pay on Ebay but without the risk of bad tubes. http://home.att.net/~esrc/esrcs3.html |
jyd
| | Posted on Friday, October 19, 2001 - 1:54 pm: |
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www.bills2way.com has 8950s |
chuck miller
| | Posted on Sunday, November 04, 2001 - 10:44 pm: |
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i have an old raider that takes 6jg6a 4 of them i know there are around $40.00 each can cheaper tubes work and dose anyone know any thing about this kind of amp i have not used it for years it still will do 60dead swing to 100 watts after cleaning the dust off the tubes. |
jyd
| | Posted on Monday, November 05, 2001 - 10:05 am: |
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good amp its worth puting tubes in use the same tube,they are loud amp,and the dna amps blead alot it should do about 250 to 300. if it dont have a fan in it i recomend geting one at radio shack like 110 or 120 vac put a cord on it and mount it and olug it in the wall |
Vernonott
| | Posted on Monday, November 05, 2001 - 8:20 am: |
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The Raider should do close to three hundred with new tubes.It's really cost prohibited to rewire and retube it. |
chuck m,
| | Posted on Tuesday, November 06, 2001 - 12:28 am: |
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thanks i checked out the prices at the web site joe put they are closer to $30.00 for the tubes each and it has a fan in it thanks i might try that if it will do 200 / 300 . |
Bracketbird
| | Posted on Sunday, July 14, 2002 - 12:18 am: |
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chuck m,i had a raider once ...did about 250 driving it hard. it needed tubes also. lasted a long time .i might have a set of tubes for yours as i come across a set but the old raider was already in the boneyard. i will check and let ya know. Anyone know lots bout a 300A????? i dont. thanxs |
Skywalker975
Junior Member
Username: Skywalker975
Post Number: 44
Registered: 11-2003
| | Posted on Tuesday, May 29, 2007 - 3:06 am: |
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Hey Guys,
I Have a question for yas. My Maco 300 works and TXs good but every now and then when i unkey i dont get RX unless I key and un key the mic again. Could this be the TX Relays sticking? And if so how can i clean it without damageing them? I'm by far not a Tech. OHHHH i almost for got where are the TX Relays located in the box. THANKS in Advance
Donnie
Skywalker
CEF250
CVC#039
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Captian_radio
Intermediate Member
Username: Captian_radio
Post Number: 209
Registered: 9-2004
| | Posted on Tuesday, May 29, 2007 - 11:11 am: |
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Happens to my mobile amp quite often, I just hit the mic button a couple of times and it comes back, bad relay, I just can't be bothered to change it.
Bob CEF451/VE1CZ
Robert L. Spicer
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Patzerozero
Senior Member
Username: Patzerozero
Post Number: 3765
Registered: 7-2004
| | Posted on Tuesday, May 29, 2007 - 6:30 pm: |
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bob has one possibility-more likely, probabilty, but, high SWR could cause it to not unkey, as well. |
Darticus
New member
Username: Darticus
Post Number: 5
Registered: 9-2012
| | Posted on Tuesday, September 17, 2013 - 7:41 pm: |
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Have a 300 but all tubes broke in shipping. ANY SCHEMATIC? What tubes go where? Any help would be great! THANKS RON |
Scrapiron63
Advanced Member
Username: Scrapiron63
Post Number: 920
Registered: 12-2001
| | Posted on Wednesday, September 18, 2013 - 6:23 pm: |
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Did it have 7 tubes? All of the 7 tube 300's that I've seen had 8950's or 6LB6's. In most of them all 7 were the same, 2 driving 5. I have seen a few that had 2-6LB6's driving 5-8950's. If you google, "maco 300 schematic" several will come up. Man that's bad the tubes all got broke, gonna be pretty expensive re-tubing that old boy. Good amps but they are getting old, the last ones were built about 30 years ago. Good luck.
Scrapiron
CEF 108 |
Stepchild
Intermediate Member
Username: Stepchild
Post Number: 213
Registered: 11-2002
| | Posted on Monday, September 30, 2013 - 10:21 pm: |
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CB Tricks has the schematic.
Stepchild
CEF-187
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