tag:blogger.com,1999:blog-7217848554003301149.post5577029947632770503..comments2024-02-12T00:06:05.306-08:00Comments on BITX Hacks: Another Approach to RF Gain Control (on ND6T's BITX60 Module)Ashhar Farhanhttp://www.blogger.com/profile/07932711010920453477noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-7217848554003301149.post-76503679768911689172017-10-15T10:30:21.517-07:002017-10-15T10:30:21.517-07:00Can i use a 10k pot?Can i use a 10k pot?Jorgehttps://www.blogger.com/profile/03097666999407777990noreply@blogger.comtag:blogger.com,1999:blog-7217848554003301149.post-36897638032279119112017-08-22T08:13:17.662-07:002017-08-22T08:13:17.662-07:00Jim, you are correct. I mislabeled the schematic! ...Jim, you are correct. I mislabeled the schematic! That should have shown pin 12 instead of 14. Good catch! -ND6T Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-7217848554003301149.post-3140071183521423712017-08-10T17:49:15.029-07:002017-08-10T17:49:15.029-07:00The current Bitx40 schematic on HF Signals shows K...The current Bitx40 schematic on HF Signals shows K1 Pin 12 as the other end of the RX-only trace. Or, am I missing something?Anonymoushttps://www.blogger.com/profile/16314358418730897671noreply@blogger.comtag:blogger.com,1999:blog-7217848554003301149.post-33141397559790127372017-07-16T12:07:24.163-07:002017-07-16T12:07:24.163-07:00Timo,
It would change the input termination of the...Timo,<br />It would change the input termination of the critical crystal filter so I would be cautious. However, if you were to use that second pot section as described in this post, it would be nicely additive. I wish I had thought of using a dual pot! Good thinking Timo! -Don,ND6TAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-7217848554003301149.post-11932708763670891452017-06-02T04:16:14.856-07:002017-06-02T04:16:14.856-07:00Hello!
How about using a dual (stereo) pot and yo...Hello!<br /><br />How about using a dual (stereo) pot and your original "tombstone" method + use the second pot to adjust if amp voltage too ? The second pot goes between r25 and r26. Will this work at all, or does it have drawbacks ?<br /><br />73 de Timo , OH7LMQAnonymousnoreply@blogger.com