Rats Nest..

[pwdrive]

When I first started this I told the forum I was to embarrased to show pics of it....You can see why.

It is the Regenerodyne developement chassis, anyone recognize the donor chassis?

I had this chassis as a bare original hence everything is bolted on to existing holes where ever they may exist as the chassis is to good to drill.

The double tuned RF/Mixer stage can be seen where the twin gang job is, my homewound coils being in front of it, the VFO is on the right with the small control knob.

Valves left to right are RF amp, Mixer, Regen Detector, !st af (af o/p behind) and VFO osc.

The large upright coil is the homewound tunable regen det. coil.

The small upright panel has the regen det. tuning (large knob) and the bandspread/fine tune (small knob)

The two controls either end of the front chassis apron are volume (LH side) and Regen (RH side) the control on top of the chassis above the volume control is the RF gain pot. The small control which is outrigged on the RH side is the VFO tuning.
The large knob on the twin gang is the RF tune.

Anyone recognize the control knobs?

Bit of a mess but works very well.

Lawrence.

[Skywave]

I keep an old chassis from a scrapped Vidor battery set for jobs just like that. As for the knobs, I do a see a few that have a Marconi look about them . . . . but then I'm not familiar with domestic stuff, if that's the type of kit from whence they originally came, so I'm probably mistaken.
You say that it's a bit of a mess but works well. When you eventually rebuild it in its finished from, it won't work so well y'know: they never do!

Al.

[pwdrive]

Hi Al, yes you are right, it won't work the same when built properly, next phase is to use B9A and or B7G valves.
The knobs are Hallicrafters as la SX28, the chassis is a stripped National HRO chassis

Lawrence.

[Skywave]

I can excuse myself for not recognising the knobs, but not for failing to recognise the chassis (although I can now, now that I know what it is) . . . Mind you, the last time I saw a naked chassis of an HRO must have been over 20 years ago, though. Moreover, it is somewhat comforting to know that I am not the only one who has stripped down a HRO: clearly a crime in certain circles I could mention. Perhaps we'll meet in the afterlife: a special branch of Hell, where will be forced to spend Eternity re-building and re-aligning HROs!

Al.

[Mark R]

Sorry Lawrence, but how is that a rats nest?
The layout and wiring look neat and it works!

cheers Mark

[pwdrive]

I can excuse myself for not recognising the knobs, but not for failing to recognise the chassis (although I can now, now that I know what it is) . . . Mind you, the last time I saw a naked chassis of an HRO must have been over 20 years ago, though. Moreover, it is somewhat comforting to know that I am not the only one who has stripped down a HRO: clearly a crime in certain circles I could mention. Perhaps we'll meet in the afterlife: a special branch of Hell, where will be forced to spend Eternity re-building and re-aligning HROs!

Al.

Yes, 'tis a crime in some circles, I came by it a while back mainly for it's rear connectors and the odd bit of hardware to put my R106 MK11 back to original.
The large steering wheel knobs shown are used also on the SX17 and also on the SX28A although on the latter the bit between the "spokes" is webbed.

Lawrence.

[pwdrive]

Sorry Lawrence, but how is that a rats nest?
The layout and wiring look neat and it works!

cheers Mark

Yeah...it's amazing what you can get away with with a cheapo camera and a fuzzy image, the bit where the regen det. tuning is consists of loads of C's in series, parallel, and combinations thereof to get the tuning range right. The real rats nest is under the chassis...

Lawrence.

[Mark R]

Ah so that is why there is no picture of the under chassis then!

come one show it all Lawrence.

cheers Mark

[pwdrive]

Ah so that is why there is no picture of the under chassis then!

come one show it all Lawrence.

cheers Mark

Oh go on then...It'll be tommorow now but will do for sure.

Lawrence.

[Mark R]

Good lad Lawrence!

cheers Mark