Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.

:Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:
How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M

:Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:
How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M

::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
::
:How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M
:
It has a 50K pot to control it. It's the last radio featured in the Gernsback Educational library No.2 "How to Make The Most Popular All Wave 1 and 2 tube Receivers."
The one called,"Beginner's One-Tube All-Wave Battery Set. Picked it because it doesn't use a transformer.
Thanks,Ed

:::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:::
::How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M
::
:It has a 50K pot to control it. It's the last radio featured in the Gernsback Educational library No.2 "How to Make The Most Popular All Wave 1 and 2 tube Receivers."
:The one called,"Beginner's One-Tube All-Wave Battery Set. Picked it because it doesn't use a transformer.
:Thanks,Ed
:
Don't have the publication. I presume you are changing the voltage to the screen grid (grid 2) with the pot. Put about 56K between the pot wiper and grid 1, and put about .22 mfd mylar cap from grid 2 to DC common. Put .1 or .22 mfd caps across any DC supply voltage to the set - near the tube. Keep input and output separate. The antenna should be coupled loosly, if it doesn't come in thru a trimmer cap. Try reversing tickler coil - does the set still howl? Try grid leak R at two megohms, and associated cap at 100 pf. Grid leak components should be mounted close to the socket. Twist filament leads to the socket, and ground one side. EdM

::::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
::::
:::How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M
:::
::It has a 50K pot to control it. It's the last radio featured in the Gernsback Educational library No.2 "How to Make The Most Popular All Wave 1 and 2 tube Receivers."
::The one called,"Beginner's One-Tube All-Wave Battery Set. Picked it because it doesn't use a transformer.
::Thanks,Ed
::
:Don't have the publication. I presume you are changing the voltage to the screen grid (grid 2) with the pot. Put about 56K between the pot wiper and grid 1, and put about .22 mfd mylar cap from grid 2 to DC common. Put .1 or .22 mfd caps across any DC supply voltage to the set - near the tube. Keep input and output separate. The antenna should be coupled loosly, if it doesn't come in thru a trimmer cap. Try reversing tickler coil - does the set still howl? Try grid leak R at two megohms, and associated cap at 100 pf. Grid leak components should be mounted close to the socket. Twist filament leads to the socket, and ground one side. EdM
:
Oh, one more thing - try this first. Are you feeding headphones? Put 100k and ~ .01 mfd across the headphones. Should you be trying to feed an audio amp, that opens up a whole new set of problems. EdM

:::::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:::::
::::How are you controlling the regeneration? With a pot to control voltage to the tube, or with a variable capacitor which controls the amount of feedback? Generaly, with a regen set, the set whistles / squeals if the regen is turned up too much. The set is most sensitive just below the point of critical regeneration - just below where the set whistles / squeals. Ed M
::::
:::It has a 50K pot to control it. It's the last radio featured in the Gernsback Educational library No.2 "How to Make The Most Popular All Wave 1 and 2 tube Receivers."
:::The one called,"Beginner's One-Tube All-Wave Battery Set. Picked it because it doesn't use a transformer.
:::Thanks,Ed
:::
::Don't have the publication. I presume you are changing the voltage to the screen grid (grid 2) with the pot. Put about 56K between the pot wiper and grid 1, and put about .22 mfd mylar cap from grid 2 to DC common. Put .1 or .22 mfd caps across any DC supply voltage to the set - near the tube. Keep input and output separate. The antenna should be coupled loosly, if it doesn't come in thru a trimmer cap. Try reversing tickler coil - does the set still howl? Try grid leak R at two megohms, and associated cap at 100 pf. Grid leak components should be mounted close to the socket. Twist filament leads to the socket, and ground one side. EdM
::
:Oh, one more thing - try this first. Are you feeding headphones? Put 100k and ~ .01 mfd across the headphones. Should you be trying to feed an audio amp, that opens up a whole new set of problems. EdM
:
Thanks ED!
The plans has a 2 meg grid leak. A .002 mf across the 2 terminals that are used on the pot. A 350 mmf that connects pin 3 on the tube to the stator of the 140 variable cap. And, .1mf that connects the 2- pin on the tube to the B+ voltage.

:Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:
First check the phase of the feedback. Try reversing the connections to the tickler winding. If the feedback control isn't effective at either polarity, try changing the coils configuration. This involves moving the tickler winding further away from the tuned part. If the coupling is too close you can get audio feedback. When all is well you should hear a rushing noise as feedback increases, followed by howling as the set goes into oscillation. The most sensitive setting is just before it breaks into oscillation.

Regenerative sets perform well.

::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
::
:First check the phase of the feedback. Try reversing the connections to the tickler winding. If the feedback control isn't effective at either polarity, try changing the coils configuration. This involves moving the tickler winding further away from the tuned part. If the coupling is too close you can get audio feedback. When all is well you should hear a rushing noise as feedback increases, followed by howling as the set goes into oscillation. The most sensitive setting is just before it breaks into oscillation.
:
:Regenerative sets perform well.
:
Sorry, I am in and out of computer access. Homer, it could be that the coils you are using were made for a tube with less gain, such as a triode. I like regen sets, and have probably built a hundred over fifty years. I have found schematics in old books and magazines that were not complete or were incorrect. In the interest of keeping alive a dying art, if you, or anyone else, would like info on building regen sets, send me a Stamped Self Addressed Envelope. NOTE: NOTHING IS FOR SALE, and I will not give your address to anyone. If you send me a schematic of what you have built, I will take a look at it. I will also send a list of books one may be able to find on the internet, and instructions for making coils using sections of 1/2" PVC pipe to anyone who is interested. Give me up to two weeks to respond. There is also info in many AARL handbooks up to about 1957. Ed Mustoe, 1002 Parkview Drive, Pflugerville, TX 78660. Ed M

:::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
:::
::First check the phase of the feedback. Try reversing the connections to the tickler winding. If the feedback control isn't effective at either polarity, try changing the coils configuration. This involves moving the tickler winding further away from the tuned part. If the coupling is too close you can get audio feedback. When all is well you should hear a rushing noise as feedback increases, followed by howling as the set goes into oscillation. The most sensitive setting is just before it breaks into oscillation.
::
::Regenerative sets perform well.
::
:Sorry, I am in and out of computer access. Homer, it could be that the coils you are using were made for a tube with less gain, such as a triode. I like regen sets, and have probably built a hundred over fifty years. I have found schematics in old books and magazines that were not complete or were incorrect. In the interest of keeping alive a dying art, if you, or anyone else, would like info on building regen sets, send me a Stamped Self Addressed Envelope. NOTE: NOTHING IS FOR SALE, and I will not give your address to anyone. If you send me a schematic of what you have built, I will take a look at it. I will also send a list of books one may be able to find on the internet, and instructions for making coils using sections of 1/2" PVC pipe to anyone who is interested. Give me up to two weeks to respond. There is also info in many AARL handbooks up to about 1957. Ed Mustoe, 1002 Parkview Drive, Pflugerville, TX 78660. Ed M
:
:Sorry, the offer to try to share info is to Jack, Homer, or any other interested party. Ed M:

::::Made a 1 tube regen. What can make it constantly whistle? Somethimes static goes with the whistle.Picked up 2 stations, but they are very faint and the voice isn't clear. It uses a 33 tube, a 50k pot and Octocoils.
::::
:::First check the phase of the feedback. Try reversing the connections to the tickler winding. If the feedback control isn't effective at either polarity, try changing the coils configuration. This involves moving the tickler winding further away from the tuned part. If the coupling is too close you can get audio feedback. When all is well you should hear a rushing noise as feedback increases, followed by howling as the set goes into oscillation. The most sensitive setting is just before it breaks into oscillation.
:::
:::Regenerative sets perform well.
:::
::Sorry, I am in and out of computer access. Homer, it could be that the coils you are using were made for a tube with less gain, such as a triode. I like regen sets, and have probably built a hundred over fifty years. I have found schematics in old books and magazines that were not complete or were incorrect. In the interest of keeping alive a dying art, if you, or anyone else, would like info on building regen sets, send me a Stamped Self Addressed Envelope. NOTE: NOTHING IS FOR SALE, and I will not give your address to anyone. If you send me a schematic of what you have built, I will take a look at it. I will also send a list of books one may be able to find on the internet, and instructions for making coils using sections of 1/2" PVC pipe to anyone who is interested. Give me up to two weeks to respond. There is also info in many AARL handbooks up to about 1957. Ed Mustoe, 1002 Parkview Drive, Pflugerville, TX 78660. Ed M
::
::Sorry, the offer to try to share info is to Jack, Homer, or any other interested party. Ed M:
:
:
Thanks to all.