This was nicks response.if anyone could look at the layout and be more specific it would help. I am a newbie...> John
>
> For sure, man.
>
> What you need is an interrupt style loop.
>
> This is on a lot of my amps, for example the Dumble clones. So it's also
> known as preamp out/ power amp in.
>
> However, the 18W TMB EF86, each channel enters the phase inverter on each
> side of it.
>
> This means, your loop needs to be on each side. So it'd be similar to the
> DZ30 (matchless DC30)'s loop, where stereo jacks are used for the purpose.
>
> To operate, you'd need a Y cable.
>
> To make things simple, perhaps you can just put the loop to 1 of the
> channels only.
>
> This way, you can still access the power section, without too much
> complication.
>
> If that's the case, do it on the TMB channel perhaps.
>
> All you need is 2 cliff jacks + some wire (shielded cable, preferably).
>
> Thanks!
>
> nik