RE: [softrock40] FW: ensemble II problem
- Oops is right, but it is my oops...found the problem: a brand new bnc cable from All Electronics was bad...I have a doubled-shieldedsilver plated Teflon cable, and used it and no problems...never would have thought a new cable could be bad or intermittent.The new one is in the circular file!73'sGlen K4KV-----Original Message-----
From: email@example.com [mailto:firstname.lastname@example.org]On Behalf Of R. R. (Robby) Robson
Sent: Saturday, June 22, 2013 11:14 AM
Subject: Re: [softrock40] FW: ensemble II problemOops. Thought that was a question posed to me via the comments link on my WB5RVZ pages. Glen has already posed the question on the reflector. My bad.On Sat, Jun 22, 2013 at 10:08 AM, R. R. (Robby) Robson <rrrobson@...> wrote:Glen:I am on vacation and away from my bench.You would do better to post these questions on the Softrock40 reflector--On Fri, Jun 21, 2013 at 9:54 AM, Glen <k4kv@...> wrote:
I have traced the signal paths through to the QSD chip. I have 50mv of
signal on pins 3,6,11,12
from the test generator. I have quadrature clock on pins 2 and 14. Pins
1,8,15 are low and 16 pin
+5. No output can be seen on pins 7 and 9.
Can I assume this chip is bad? The board has been intermittent since it was
built, sometimes working
very nicely! I have used wick to suck all the excess solder off the pins.
I know it would be
very unusual to have a bad chip, but I cannot see any other thing.
I guess since I am using it for a panadapter, I could remove U8 and jumper
around it and put
it in place of U10.
Glen K4KVCheers,RobbyRichard R. (Robby) RobsonLTC USA (RET)--Cheers,RobbyRichard R. (Robby) RobsonLTC USA (RET)
> Can I assume this chip is bad? The board has been intermittent since it wasGlen,
> built, sometimes working
> very nicely! I have used wick to suck all the excess solder off the pins.
> I know it would be
> very unusual to have a bad chip, but I cannot see any other thing.
I had the very similar situation with my Lite RX. The mixer replacement with new one resolve the problem.
Andy - YL2QN