ten tec 1235 회로

http://radiobuilder.blogspot.kr/2010/02/sw-receiver4t3icssbsuperregen9-bander.html

https://www.google.co.kr/search?q=Ten-Tec+1253+Shortwave+Receiver&sa=X&biw=1280&bih=913&tbm=isch&imgil=zOX6rMHoLdTbdM%253A%253BNkaqDbXrh1Gv8M%253Bhttp%25253A%25252F%25252Fradiobuilder.blogspot.com%25252F2010%25252F02%25252Fsw-receiver4t3icssbsuperregen9-bander.html&source=iu&pf=m&fir=zOX6rMHoLdTbdM%253A%252CNkaqDbXrh1Gv8M%252C_&usg=__ATOLxPlnZqCz_iPwt8H15KR17uM%3D&ved=0ahUKEwiP5P3mi9nQAhWNq5QKHV-vA-MQyjcIMg&ei=zUlDWM_JDI3X0gTf3o6YDg#imgrc=zOX6rMHoLdTbdM%3A

https://circuitsalad.com/2012/09/30/a-high-performance-regenerative-radio/

https://sites.google.com/site/linuxdigitallab/rf-ham-radio/regen-high-performance-rig

http://la3za.blogspot.kr/2011/06/regenerative-receiver-for-40-m-band.html  WBR

http://folk.uio.no/sverre/LA3ZA/blog/LA3ZA_WBR_regen.pdf

https://circuitsalad.com/2012/09/30/a-high-performance-regenerative-radio/

http://radiobuilder.blogspot.kr/2010/02/sw-receiver4t3icssbsuperregen9-bander.html