MRF477
- cb4ever104
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- Location: Alicante , España
MRF477
Is this 477 real ?
https://www.ebay.es/itm/202690097604
Doesn't look right to me . Saying that I'm probably wrong
https://www.ebay.es/itm/202690097604
Doesn't look right to me . Saying that I'm probably wrong
Last edited by cb4ever104 on 31 May 2019, 10:43, edited 1 time in total.
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- 14CS06
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- cb4ever104
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- Location: Alicante , España
Re: MRF477
I don't like it Claude . Aren't there normally 2 little indentations on the main body ? Also , the letters don't look right to me either .
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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Re: MRF477
Hello dears! when I had President Jackson I accidentally burned the mrf477 transistor. I successfully replaced кт920 (Russia)
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Re: MRF477
I had to Unscrew the black radiator and drill a hole for the nut inside .output power has not changed
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Re: MRF477
in any case, fake transistors made in Russia does not happen....
- Otter
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Re: MRF477
It looks good to me.
"To this day the words Stirling bridge conjour pride in every Scotsman's heart, while to an Englishman those same words conjour literally no feelings at all." - Cunk on Britain S1 E1
- cb4ever104
- Legend
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Re: MRF477
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
- Mitch
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Re: MRF477
Have the pins been tinned? Back in the day we called these 'gold leggers' because the pins were gold coloured. They were expensive then too.cb4ever104 wrote: ↑30 May 2019, 11:58 Is this 477 real ?
https://www.ebay.es/itm/202690097604
Don't look right to me . Saying that I'm probably wrong
The perfect face for radio.
- Otter
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Re: MRF477
The 1990s ones didn't have gold legs. They did in the '80s.
"To this day the words Stirling bridge conjour pride in every Scotsman's heart, while to an Englishman those same words conjour literally no feelings at all." - Cunk on Britain S1 E1
- dt307
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Re: MRF477
finished this 1 off last night with a sd1446 but a mrf455 also work the same and cheaper and will last longer than a 477 less than £30 new from a main uk dealer via rm italy.
just a thought for you sammy, i know you can make a pcb up to hold the 455/1446 but i fitted a nos driver and used final and this way the bill to the customer fitted is going to be £25.
2x560pf caps removed,bias diode removed,new 4001 bias doide fitted so not hard to do
just a thought for you sammy, i know you can make a pcb up to hold the 455/1446 but i fitted a nos driver and used final and this way the bill to the customer fitted is going to be £25.
2x560pf caps removed,bias diode removed,new 4001 bias doide fitted so not hard to do
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163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- dt307
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Re: MRF477
side note incase any1 tries it.
you must ground 1 of the emitter tabs via 1 of the screws.
the mod is rogerbirds.....( lincoln guru) detials on the cbtricks website under hr2510
you must ground 1 of the emitter tabs via 1 of the screws.
the mod is rogerbirds.....( lincoln guru) detials on the cbtricks website under hr2510
163dt307-chris
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
“I fear the day that technology will surpass our human interaction. The world will have a generation of idiots.”
― Albert Einstein
- Otter
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Re: MRF477
All of these were bought before Chinese fakes were even thought of.
The modern fakes on eBay have the word "ON" in a circle. On semiconductors never made MRF477 or MRF497."To this day the words Stirling bridge conjour pride in every Scotsman's heart, while to an Englishman those same words conjour literally no feelings at all." - Cunk on Britain S1 E1
- cb4ever104
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Re: MRF477
It's strange how the sight of a few transistors can get the juices flowing
30TM060
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
Paul aka "Sammy". (108) PY60 Old Paisley DX Group (RIP Rab Markie)
Ex GM0 , now EA5 .
Handle "Fortune Hunter" back in "the day"
Radios ....? Anything that says "TAIWAN R.O.C" on the back.
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Re: MRF477
Any so called MRF477 with a date code later than 95 is fake they stopped making them in 95.
real 477s the plastic is black not slate or gray the one in the pic is the real deal to look for anything that has any other logo than the Motorola circled M is not.
Re ON Semi as Otter said they never made 477s or 455s in fact they dont make any RF transistors for the HF bands.
real 477s the plastic is black not slate or gray the one in the pic is the real deal to look for anything that has any other logo than the Motorola circled M is not.
Re ON Semi as Otter said they never made 477s or 455s in fact they dont make any RF transistors for the HF bands.
Techquest AKA Jedi
Av101 Astro Plane Old Imax n Loads of Radios
Mmmmmmmmmmm ADAMS n other Presidents
Av101 Astro Plane Old Imax n Loads of Radios
Mmmmmmmmmmm ADAMS n other Presidents