75 tube

1/20/2005 4:07:03 AMbutch s.

hi i had a 75 tube go bad on me and didn't have another handy but i had a lot of 6av6s so i mounted one in an old base and it seems to work fine i was wondering if this has no ill effects why can't i cut off a grid cap tube and mount it over the 6av6 nip off the grid cap and run athe grid wire from the 6av6 up through the small hole on top and glue on another grid cap it should look fairly realistic i've done this with rectifier tubes but silicon diodes don't glow. cutting off tubes with a glass cutter or dremel you sometimes break the tube but most of us have lots of duds laying around were saving for something.its an idea but maybe not a great one. butch

1/22/2005 2:39:57 AMSteven in Oregon

Butch

Electronically, there is nothing wrong with what you've done. The 6AV6 is the post-war, miniature version of the 75.

However, if you make a permanent modification to your radio, you will greatly reduce it's resale value.

You may want to try buying a replacement 75. Many large cities have at least one electronic surplus store that carries old radio parts. There are also several web sites that sell new and used tubes. The most popular is Antique Electronic Supply --> www.tubesandmore.com. Their price for 75 tubes: new, $17.50; used, $8.50 (plus shipping and handling). They require a $10 minimum order, so if you want a used 75, you'll have to buy two.

:hi i had a 75 tube go bad on me and didn't have another handy but i had a lot of 6av6s so i mounted one in an old base and it seems to work fine i was wondering if this has no ill effects why can't i cut off a grid cap tube and mount it over the 6av6 nip off the grid cap and run athe grid wire from the 6av6 up through the small hole on top and glue on another grid cap it should look fairly realistic i've done this with rectifier tubes but silicon diodes don't glow. cutting off tubes with a glass cutter or dremel you sometimes break the tube but most of us have lots of duds laying around were saving for something.its an idea but maybe not a great one. butch

1/22/2005 1:34:02 PMbutch s.

:Butch
:
:Electronically, there is nothing wrong with what you've done. The 6AV6 is the post-war, miniature version of the 75.
:
:However, if you make a permanent modification to your radio, you will greatly reduce it's resale value.
:
:You may want to try buying a replacement 75. Many large cities have at least one electronic surplus store that carries old radio parts. There are also several web sites that sell new and used tubes. The most popular is Antique Electronic Supply --> www.tubesandmore.com. Their price for 75 tubes: new, $17.50; used, $8.50 (plus shipping and handling). They require a $10 minimum order, so if you want a used 75, you'll have to buy two.
:
::hi i had a 75 tube go bad on me and didn't have another handy but i had a lot of 6av6s so i mounted one in an old base and it seems to work fine i was wondering if this has no ill effects why can't i cut off a grid cap tube and mount it over the 6av6 nip off the grid cap and run athe grid wire from the 6av6 up through the small hole on top and glue on another grid cap it should look fairly realistic i've done this with rectifier tubes but silicon diodes don't glow. cutting off tubes with a glass cutter or dremel you sometimes break the tube but most of us have lots of duds laying around were saving for something.its an idea but maybe not a great one. butch

hi you are right about reducing resale but as its a plug in unit i'll pull it and put in a 75 when one comes along i have close too 100 old sets and i'm going broke buying tubes besides i like to tinker around with them as long as a modification isn't permanent its alright thanks for your reply :butch

1/22/2005 5:40:57 PMThomas Dermody

Good point! Though I really hate miniature tubes--they are not beautiful like ST tubes, ST tubes are getting increadibly expensive. I cannot bid on a pair of 6F6G tubes without some moron bidding them up to $90. I'll stop at $60, thanks. That's an outrageous price as it is.

T.D.

::Butch
::
::Electronically, there is nothing wrong with what you've done. The 6AV6 is the post-war, miniature version of the 75.
::
::However, if you make a permanent modification to your radio, you will greatly reduce it's resale value.
::
::You may want to try buying a replacement 75. Many large cities have at least one electronic surplus store that carries old radio parts. There are also several web sites that sell new and used tubes. The most popular is Antique Electronic Supply --> www.tubesandmore.com. Their price for 75 tubes: new, $17.50; used, $8.50 (plus shipping and handling). They require a $10 minimum order, so if you want a used 75, you'll have to buy two.
::
:::hi i had a 75 tube go bad on me and didn't have another handy but i had a lot of 6av6s so i mounted one in an old base and it seems to work fine i was wondering if this has no ill effects why can't i cut off a grid cap tube and mount it over the 6av6 nip off the grid cap and run athe grid wire from the 6av6 up through the small hole on top and glue on another grid cap it should look fairly realistic i've done this with rectifier tubes but silicon diodes don't glow. cutting off tubes with a glass cutter or dremel you sometimes break the tube but most of us have lots of duds laying around were saving for something.its an idea but maybe not a great one. butch
:
:
:
:
:hi you are right about reducing resale but as its a plug in unit i'll pull it and put in a 75 when one comes along i have close too 100 old sets and i'm going broke buying tubes besides i like to tinker around with them as long as a modification isn't permanent its alright thanks for your reply :butch

1/28/2005 3:09:05 PMJohn McPherson

Butch,
The modified plug in base is a typical fifties era modification. Your plan is a good one to wait until a good 75 comes along.

::Butch
::
::Electronically, there is nothing wrong with what you've done. The 6AV6 is the post-war, miniature version of the 75.
::
::However, if you make a permanent modification to your radio, you will greatly reduce it's resale value.
::
::You may want to try buying a replacement 75. Many large cities have at least one electronic surplus store that carries old radio parts. There are also several web sites that sell new and used tubes. The most popular is Antique Electronic Supply --> www.tubesandmore.com. Their price for 75 tubes: new, $17.50; used, $8.50 (plus shipping and handling). They require a $10 minimum order, so if you want a used 75, you'll have to buy two.
::
:::hi i had a 75 tube go bad on me and didn't have another handy but i had a lot of 6av6s so i mounted one in an old base and it seems to work fine i was wondering if this has no ill effects why can't i cut off a grid cap tube and mount it over the 6av6 nip off the grid cap and run athe grid wire from the 6av6 up through the small hole on top and glue on another grid cap it should look fairly realistic i've done this with rectifier tubes but silicon diodes don't glow. cutting off tubes with a glass cutter or dremel you sometimes break the tube but most of us have lots of duds laying around were saving for something.its an idea but maybe not a great one. butch
:
:
:
:
:hi you are right about reducing resale but as its a plug in unit i'll pull it and put in a 75 when one comes along i have close too 100 old sets and i'm going broke buying tubes besides i like to tinker around with them as long as a modification isn't permanent its alright thanks for your reply :butch