UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

Simon_V · 2nd Apr 2018, 9:39 pm

As a side note the circuit diagram on page 145 of the service manual is a load of rubbish. I suspect the people producing the manual were working to a data sheet rather than what Trio had actually produced and even then they got it wrong.

Small 1 Mhz crystals are very rare beasts but the circuit works OK with a ceramic resonator as long as you change the 2.2 Mohm resistor for a 1 Mohm

I have the PCB designed in DesignSpark and I am happy to share it with other forum members as well as any other knowledge I have on these radios as I have had to become a bit of an expert to get my 711 working properly, last of this kind of stuff I did was when I was a rig doctor for the local CB'rs

If anyone wants some amateur radio chat I am the Repeater Keeper for GB3UP and we have Echolink on it.

Simon GW6TKK

2nd Apr 2018, 9:39 pm	#8
Simon_V Retired Dormant Member Join Date: Feb 2014 Location: Pembrokeshire, UK. Posts: 52	Re: Trio TS711 & 811 As a side note the circuit diagram on page 145 of the service manual is a load of rubbish. I suspect the people producing the manual were working to a data sheet rather than what Trio had actually produced and even then they got it wrong. Small 1 Mhz crystals are very rare beasts but the circuit works OK with a ceramic resonator as long as you change the 2.2 Mohm resistor for a 1 Mohm I have the PCB designed in DesignSpark and I am happy to share it with other forum members as well as any other knowledge I have on these radios as I have had to become a bit of an expert to get my 711 working properly, last of this kind of stuff I did was when I was a rig doctor for the local CB'rs If anyone wants some amateur radio chat I am the Repeater Keeper for GB3UP and we have Echolink on it. Simon GW6TKK