Shadetree Mechanic
Delaware Base Station 808
Gold Finger from WWPDX has some cap changes that can be made to make the audio wider. You could probably just do the receive if that's all you wanted.
You might have to be a member to get to that part of the site, I am not sure.
http://www.wwpdx.com/ForumWWPDX/viewtopic.php?f=132&t=16658&sid=a87616319de15c752e3ab8bbe817836e
Re: Request - Stryker 955
Postby Goldfinger » Wed May 15, 2019 4:30 pm
TX all modes:
Change C534, C571, C570 to 1uF or 2.2uF non polarized
C530 is already 1uF.
AM: Change C527, C153, C152 to 1uF or 2.2uF non polarized. Change E14 to 330uF 25 volt or higher Electrolytic, observe polarity.
FM: Change C528. C536 to 1uF or 2.2uF non polarized
SSB: C528. C539 are already 1uF
Direct inject at C152
The echo board will likely have to be bypassed for these mods to work completely.
Edit: The echo board looks like it has all 1uF caps in the audio chain except C900 which is a .1uF Changing it to a 1uF will fatten up the lows some. Bypassing the echo will still be better for full audio bandwidth.
RX all modes:
Change C136, C137, C165 to 1uF or 2.2uF non polarized
Change E10 to a 1000uF 25 volt or higher Electrolytic, observe polarity.
More highs: Make C37 lower in value
AM: change C163 to 1uF or 2.2uF non polarized
FM: Change C135 to 1uF or 2.2uF non polarized
SSB: Change C197 to 1uF or 2.2uF non polarized
wwpdx
wwpdx.com
You might have to be a member to get to that part of the site, I am not sure.
http://www.wwpdx.com/ForumWWPDX/viewtopic.php?f=132&t=16658&sid=a87616319de15c752e3ab8bbe817836e
Re: Request - Stryker 955
Postby Goldfinger » Wed May 15, 2019 4:30 pm
TX all modes:
Change C534, C571, C570 to 1uF or 2.2uF non polarized
C530 is already 1uF.
AM: Change C527, C153, C152 to 1uF or 2.2uF non polarized. Change E14 to 330uF 25 volt or higher Electrolytic, observe polarity.
FM: Change C528. C536 to 1uF or 2.2uF non polarized
SSB: C528. C539 are already 1uF
Direct inject at C152
The echo board will likely have to be bypassed for these mods to work completely.
Edit: The echo board looks like it has all 1uF caps in the audio chain except C900 which is a .1uF Changing it to a 1uF will fatten up the lows some. Bypassing the echo will still be better for full audio bandwidth.
RX all modes:
Change C136, C137, C165 to 1uF or 2.2uF non polarized
Change E10 to a 1000uF 25 volt or higher Electrolytic, observe polarity.
More highs: Make C37 lower in value
AM: change C163 to 1uF or 2.2uF non polarized
FM: Change C135 to 1uF or 2.2uF non polarized
SSB: Change C197 to 1uF or 2.2uF non polarized
wwpdx
wwpdx.com